Subject: [Tigers] Tiger Differential

From: Joel Martin via Tigers <[email-masked]>
Date: Sat, 16 Nov 2019 16:02:36 +0000 (UTC)

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The manual shows that Tiger rear ends are:=C2=A0 Salisbury hypoid =E2=80=98=
4.HA=E2=80=99 with a 2.88 to 1ratio.=C2=A0 What does the 4.HA stand for?

My understanding is these are posi traction meaning bothwheels are applying=
 power.

Those of you with 2.88 rear ratio gears, wide ratio 4 speedtop loader trans=
missions, what is your RPM=E2=80=99s in fourth at 50, 60,70 & 80MPH?=C2=A0

Those of you running other rear end rations, other factorsthe same, what ar=
e your RPM=E2=80=99s at the same speed and what ratio?

I like to drive my cars and just got back from a 1,263 mile6 day trip in my=
 original owner 1973 MGB with 229,000 miles on the car.=C2=A0

Things to consider:=C2=A01966 MK1A with 289 HiPo motor with about 300 HP an=
d estimated 9.4.1 compression

600 cfm 4 barrel Holley carburetor

Headers with 2.25=E2=80=9D exhaust

15=E2=80=9D wheels running 205\50 x 15 tires

Wide ratio top loader 4 speed transmission

Believe Salisbury posi rear end=20

Closed, open, locked, posi, ratios =E2=80=93 the list isendless.=C2=A0 What=
 I am looking for is avery streetable around town and on the highway posi r=
ear end ratio that willwork well with a good balance between acceleration f=
or fun and highwaycruising.=C2=A0 I am not there yet.=C2=A0 I have the acce=
leration for fun part in place but not the highway cruising (of course - av=
oid highways\interstate).

Data means a lot regarding RPM=E2=80=99s at speeds between 50 to 80mph.=C2=
=A0 Those of you who have switchedratios, please share your pros and cons.

Thank you for your input.

Regards

Joel Martin

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<p class=3D"ydpe3a33268MsoNormal">The manual shows that Tiger rear ends are=
:<span>&nbsp; </span>Salisbury hypoid =E2=80=984.HA=E2=80=99 with a 2.88 to=
 1
ratio.<span>&nbsp; </span>What does the 4.HA stand for?</p>

<p class=3D"ydpe3a33268MsoNormal">My understanding is these are posi tracti=
on meaning both
wheels are applying power.</p>

<p class=3D"ydpe3a33268MsoNormal">Those of you with 2.88 rear ratio gears, =
wide ratio 4 speed
top loader transmissions, what is your RPM=E2=80=99s in fourth at 50, 60,70=
 &amp; 80
MPH?&nbsp;

</p><p class=3D"ydpe3a33268MsoNormal">Those of you running other rear end r=
ations, other factors
the same, what are your RPM=E2=80=99s at the same speed and what ratio?</p>

<p class=3D"ydpe3a33268MsoNormal">I like to drive my cars and just got back=
 from a 1,263 mile
6 day trip in my original owner 1973 MGB with 229,000 miles on the car.&nbs=
p;

</p><p class=3D"ydpe3a33268MsoNormal">Things to consider:<span>&nbsp;
</span>1966 MK1A with 289 HiPo motor with about 300 HP and estimated 9.4.1 =
compression</p>

<p class=3D"ydpe3a33268MsoNormal">600 cfm 4 barrel Holley carburetor</p>

<p class=3D"ydpe3a33268MsoNormal">Headers with 2.25=E2=80=9D exhaust</p>

<p class=3D"ydpe3a33268MsoNormal">15=E2=80=9D wheels running 205\50 x 15 ti=
res</p>

<p class=3D"ydpe3a33268MsoNormal">Wide ratio top loader 4 speed transmissio=
n</p>

<p class=3D"ydpe3a33268MsoNormal">Believe Salisbury posi rear end </p>

<p class=3D"ydpe3a33268MsoNormal">Closed, open, locked, posi, ratios =E2=80=
=93 the list is
endless.<span>&nbsp; </span>What I am looking for is a
very streetable around town and on the highway posi rear end ratio that wil=
l
work well with a good balance between acceleration for fun and highway
cruising.<span>&nbsp; </span>I am not there yet.&nbsp; I have the accelerat=
ion for fun part in place but not the highway cruising (of course - avoid h=
ighways\interstate).<br></p>

<p class=3D"ydpe3a33268MsoNormal">Data means a lot regarding RPM=E2=80=99s =
at speeds between 50 to 80
mph.<span>&nbsp; </span>Those of you who have switched
ratios, please share your pros and cons.</p>

<p class=3D"ydpe3a33268MsoNormal">Thank you for your input.</p>

<p class=3D"ydpe3a33268MsoNormal">Regards</p>

<p class=3D"ydpe3a33268MsoNormal">Joel Martin</p>

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From: coolvt--- via Tigers <[email-masked]>
Date: Sat, 16 Nov 2019 16:07:22 +0000 (UTC)

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Consider a 5 speed (or 6 speed). With a high overdrive you can cruise at 70=
 at around 1500-1700 rpm.
In a message dated 11/16/2019 11:03:42 AM Eastern Standard Time, tigers@aut=
ox.team.net writes:

The manual shows that Tiger rear ends are:=C2=A0 Salisbury hypoid =E2=80=98=
4.HA=E2=80=99 with a 2.88 to 1 ratio.=C2=A0 What does the 4.HA stand for?

My understanding is these are posi traction meaning both wheels are applyin=
g power.

Those of you with 2.88 rear ratio gears, wide ratio 4 speed top loader tran=
smissions, what is your RPM=E2=80=99s in fourth at 50, 60,70 & 80 MPH?=C2=
=A0

Those of you running other rear end rations, other factors the same, what a=
re your RPM=E2=80=99s at the same speed and what ratio?

I like to drive my cars and just got back from a 1,263 mile 6 day trip in m=
y original owner 1973 MGB with 229,000 miles on the car.=C2=A0

Things to consider:=C2=A0 1966 MK1A with 289 HiPo motor with about 300 HP a=
nd estimated 9.4.1 compression

Believe Salisbury posi rear end

Closed, open, locked, posi, ratios =E2=80=93 the list is endless.=C2=A0 Wha=
t I am looking for is a very streetable around town and on the highway posi=
 rear end ratio that will work well with a good balance between acceleratio=
n for fun and highway cruising.=C2=A0 I am not there yet.=C2=A0 I have the =
acceleration for fun part in place but not the highway cruising (of course =
- avoid highways\interstate).

Data means a lot regarding RPM=E2=80=99s at speeds between 50 to 80 mph.=C2=
=A0 Those of you who have switched ratios, please share your pros and cons.

Regards

Joel Martin

[email-masked]

Unsubscribe: http://autox.team.net/mailman/options/tigers/[email-masked]

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<div>
<div class="userEdit" style="font-family: arial, helvetica, sans-serif; font-size: 14pt; color: #000000;">
<div><span style="font-family: arial, helvetica, sans-serif; font-size: 14pt; color: #000000;">Consider a 5 speed (or 6 speed). With a high overdrive you can cruise at 70 at around 1500-1700 rpm.</span></div>
<div><span style="font-family: arial, helvetica, sans-serif; font-size: 14pt; color: #000000;"><br></span></div>
</div>
In a message dated 11/16/2019 11:03:42 AM Eastern Standard Time, [email-masked] writes:
<div><br></div>
<div class="quotedReply">
<blockquote style="padding-left: 5px; margin-left: 5px; border-left: blue 2px solid;">
<div id="yiv3614920762">
<div>
<div class="yiv3614920762yahoo-style-wrap" style="font-family: garamond, new york, times, serif; font-size: 16px;">
<div>
<div>
<p class="yiv3614920762ydpe3a33268MsoNormal">The manual shows that Tiger rear ends are:&nbsp; Salisbury hypoid &lsquo;4.HA&rsquo; with a 2.88 to 1 ratio.&nbsp; What does the 4.HA stand for?</p>
<p class="yiv3614920762ydpe3a33268MsoNormal">My understanding is these are posi traction meaning both wheels are applying power.</p>
<p class="yiv3614920762ydpe3a33268MsoNormal">Those of you with 2.88 rear ratio gears, wide ratio 4 speed top loader transmissions, what is your RPM&rsquo;s in fourth at 50, 60,70 &amp; 80 MPH?&nbsp;</p>
<p class="yiv3614920762ydpe3a33268MsoNormal">Those of you running other rear end rations, other factors the same, what are your RPM&rsquo;s at the same speed and what ratio?</p>
<p class="yiv3614920762ydpe3a33268MsoNormal">I like to drive my cars and just got back from a 1,263 mile 6 day trip in my original owner 1973 MGB with 229,000 miles on the car.&nbsp;</p>
<p class="yiv3614920762ydpe3a33268MsoNormal">Things to consider:&nbsp; 1966 MK1A with 289 HiPo motor with about 300 HP and estimated 9.4.1 compression</p>
<p class="yiv3614920762ydpe3a33268MsoNormal">600 cfm 4 barrel Holley carburetor</p>
<p class="yiv3614920762ydpe3a33268MsoNormal">Headers with 2.25&rdquo; exhaust</p>
<p class="yiv3614920762ydpe3a33268MsoNormal">15&rdquo; wheels running 205\50 x 15 tires</p>
<p class="yiv3614920762ydpe3a33268MsoNormal">Wide ratio top loader 4 speed transmission</p>
<p class="yiv3614920762ydpe3a33268MsoNormal">Believe Salisbury posi rear end</p>
<p class="yiv3614920762ydpe3a33268MsoNormal">Closed, open, locked, posi, ratios &ndash; the list is endless.&nbsp; What I am looking for is a very streetable around town and on the highway posi rear end ratio that will work well with a good balance between acceleration for fun and highway cruising.&nbsp; I am not there yet.&nbsp; I have the acceleration for fun part in place but not the highway cruising (of course - avoid highways\interstate).</p>
<p class="yiv3614920762ydpe3a33268MsoNormal">Data means a lot regarding RPM&rsquo;s at speeds between 50 to 80 mph.&nbsp; Those of you who have switched ratios, please share your pros and cons.</p>
<p class="yiv3614920762ydpe3a33268MsoNormal">Thank you for your input.</p>
<p class="yiv3614920762ydpe3a33268MsoNormal">Regards</p>
<p class="yiv3614920762ydpe3a33268MsoNormal">Joel Martin</p>
</div>
</div>
</div>
</div>
</div>
<span style="background-color: transparent; color: #000000; font-family: Arial; font-size: small;">_______________________________________________<br><br><a href="mailto:[email-masked]" rel="noopener noreferrer">[email-masked]</a><br><br>Donate: <a href="http://www.team.net/donate.html" target="_blank" rel="noopener noreferrer">http://www.team.net/donate.html</a><br>Archive: <a href="http://www.team.net/pipermail/tigers" target="_blank" rel="noopener noreferrer">http://www.team.net/pipermail/tigers </a><a href="http://autox.team.net/archive" target="_blank" rel="noopener noreferrer">http://autox.team.net/archive</a><br><br>Unsubscribe: <a href="http://autox.team.net/mailman/options/tigers/[email-masked]" target="_blank" rel="noopener noreferrer">http://autox.team.net/mailman/options/tigers/[email-masked]</a><br><br><br></span></blockquote>
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[email-masked]

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From: Gary via Tigers <[email-masked]>
Date: Sat, 16 Nov 2019 08:16:34 -0800

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Stock rear end is NOT posi.  It is now called Dana44, same diff as a lot 
of 4x4 front as well as others.
A normal rear end shop can put posi in if someone didn't do yours before.
Axles, bearings, hubs are unique Tiger.
Stock is about 2450RPM at 60, way too fast unless you have a big cam IMHO.
Big carb, hopped up 289, you probably get 14mpg highway?  Ouch.
I have a stock 5.0L/T-5 wide ratio..  maybe 220HP, 14in wheels =1950RPM 
at 70.. NICE.  Like a modern car
MPG > 20 but  not sure..
Good luck,
Gary

On 11/16/2019 8:02 AM, Joel Martin via Tigers wrote:
>
> The manual shows that Tiger rear ends are:Salisbury hypoid ‘4.HA’ with 
> a 2.88 to 1 ratio.What does the 4.HA stand for?
>
> My understanding is these are posi traction meaning both wheels are 
> applying power.
>
> Those of you with 2.88 rear ratio gears, wide ratio 4 speed top loader 
> transmissions, what is your RPM’s in fourth at 50, 60,70 & 80 MPH?
>
> Those of you running other rear end rations, other factors the same, 
> what are your RPM’s at the same speed and what ratio?
>
> I like to drive my cars and just got back from a 1,263 mile 6 day trip 
> in my original owner 1973 MGB with 229,000 miles on the car.
>
> Things to consider:1966 MK1A with 289 HiPo motor with about 300 HP and 
> estimated 9.4.1 compression
>
> Headers with 2.25” exhaust
>
> 15” wheels running 205\50 x 15 tires
>
> Closed, open, locked, posi, ratios – the list is endless.What I am 
> looking for is a very streetable around town and on the highway posi 
> rear end ratio that will work well with a good balance between 
> acceleration for fun and highway cruising.I am not there yet.  I have 
> the acceleration for fun part in place but not the highway cruising 
> (of course - avoid highways\interstate).
>
> Data means a lot regarding RPM’s at speeds between 50 to 80 mph.Those 
> of you who have switched ratios, please share your pros and cons.
>
> Donate: http://www.team.net/donate.html
> Unsubscribe: http://autox.team.net/mailman/options/tigers/[email-masked]
>
>

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  </head>
  <body>
    Stock rear end is NOT posi.  It is now called Dana44, same diff as a
    lot of 4x4 front as well as others.<br>
    A normal rear end shop can put posi in if someone didn't do yours
    before.<br>
    Axles, bearings, hubs are unique Tiger.<br>
    Stock is about 2450RPM at 60, way too fast unless you have a big cam
    IMHO.<br>
    Big carb, hopped up 289, you probably get 14mpg highway?  Ouch.<br>
    I have a stock 5.0L/T-5 wide ratio..  maybe 220HP, 14in wheels
    =1950RPM at 70.. NICE.  Like a modern car<br>
    MPG &gt; 20 but  not sure..<br>
    Good luck,<br>
    Gary<br>
    <br>
    <br>
    <div class="moz-cite-prefix">On 11/16/2019 8:02 AM, Joel Martin via
      Tigers wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:[email-masked]">
      <meta http-equiv="content-type" content="text/html; charset=UTF-8">
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        york, times, serif;font-size:16px;">
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            <p class="ydpe3a33268MsoNormal">The manual shows that Tiger
              rear ends are:<span>  </span>Salisbury hypoid ‘4.HA’ with
              a 2.88 to 1
              ratio.<span>  </span>What does the 4.HA stand for?</p>
            <p class="ydpe3a33268MsoNormal">My understanding is these
              are posi traction meaning both
              wheels are applying power.</p>
            <p class="ydpe3a33268MsoNormal">Those of you with 2.88 rear
              ratio gears, wide ratio 4 speed
              top loader transmissions, what is your RPM’s in fourth at
              50, 60,70 &amp; 80
              MPH? 
            </p>
            <p class="ydpe3a33268MsoNormal">Those of you running other
              rear end rations, other factors
              the same, what are your RPM’s at the same speed and what
              ratio?</p>
            <p class="ydpe3a33268MsoNormal">I like to drive my cars and
              just got back from a 1,263 mile
              6 day trip in my original owner 1973 MGB with 229,000
              miles on the car. 
            </p>
            <p class="ydpe3a33268MsoNormal">Things to consider:<span> 
              </span>1966 MK1A with 289 HiPo motor with about 300 HP and
              estimated 9.4.1 compression</p>
            <p class="ydpe3a33268MsoNormal">600 cfm 4 barrel Holley
              carburetor</p>
            <p class="ydpe3a33268MsoNormal">Headers with 2.25” exhaust</p>
            <p class="ydpe3a33268MsoNormal">15” wheels running 205\50 x
              15 tires</p>
            <p class="ydpe3a33268MsoNormal">Wide ratio top loader 4
              speed transmission</p>
            <p class="ydpe3a33268MsoNormal">Believe Salisbury posi rear
              end </p>
            <p class="ydpe3a33268MsoNormal">Closed, open, locked, posi,
              ratios – the list is
              endless.<span>  </span>What I am looking for is a
              very streetable around town and on the highway posi rear
              end ratio that will
              work well with a good balance between acceleration for fun
              and highway
              cruising.<span>  </span>I am not there yet.  I have the
              acceleration for fun part in place but not the highway
              cruising (of course - avoid highways\interstate).<br>
            </p>
            <p class="ydpe3a33268MsoNormal">Data means a lot regarding
              RPM’s at speeds between 50 to 80
              mph.<span>  </span>Those of you who have switched
              ratios, please share your pros and cons.</p>
            <p class="ydpe3a33268MsoNormal">Thank you for your input.</p>
            <p class="ydpe3a33268MsoNormal">Regards</p>
            <p class="ydpe3a33268MsoNormal">Joel Martin</p>
          </div>
          <br>
        </div>
      </div>
      <br>
      <fieldset class="mimeAttachmentHeader"></fieldset>
      <pre class="moz-quote-pre" wrap="">_______________________________________________

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[email-masked]

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From: Theo Smit via Tigers <[email-masked]>
Date: Sat, 16 Nov 2019 09:47:10 -0700 (MST)

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Didn't the axle spline count change at some point? So you can do the conver=
sion but there are a few extra tweaks necessary, possibly up to and includi=
ng the installation of new axles.=20

IIRC most of the period posi conversions were done using a Jaguar different=
ial assembly. Then there is something that sticks in my mind where the orig=
inal ring gear bolts are smaller than what is being used now. So if you're =
using a modern posi unit then you have to use stepped ring gear bolts.=20

My Tiger has the 3.31 gears (and a Torsen LSD) and it spins at about 3000 R=
PM at 60 MPH, in fourth. The five speed makes it livable but first gear is =
really short. Still need to change it over to the Z ratios.=20

-Theo=20

From: "tigers" <[email-masked]>=20
To: "Joel Martin" <[email-masked]>, "tigers" <[email-masked]>=
=20
Sent: Saturday, November 16, 2019 9:16:34 AM=20
Subject: Re: [Tigers] Tiger Differential=20

Stock rear end is NOT posi. It is now called Dana44, same diff as a lot of =
4x4 front as well as others.=20
A normal rear end shop can put posi in if someone didn't do yours before.=
=20
Axles, bearings, hubs are unique Tiger.=20
Stock is about 2450RPM at 60, way too fast unless you have a big cam IMHO.=
=20
Big carb, hopped up 289, you probably get 14mpg highway? Ouch.=20
I have a stock 5.0L/T-5 wide ratio.. maybe 220HP, 14in wheels =3D1950RPM at=
 70.. NICE. Like a modern car=20
MPG > 20 but not sure..=20
Good luck,=20
Gary=20

On 11/16/2019 8:02 AM, Joel Martin via Tigers wrote:=20

The manual shows that Tiger rear ends are: Salisbury hypoid =E2=80=984.HA=
=E2=80=99 with a 2.88 to 1 ratio. What does the 4.HA stand for?=20

g power.=20

Those of you with 2.88 rear ratio gears, wide ratio 4 speed top loader tran=
smissions, what is your RPM=E2=80=99s in fourth at 50, 60,70 & 80 MPH?=20

Those of you running other rear end rations, other factors the same, what a=
re your RPM=E2=80=99s at the same speed and what ratio?=20

I like to drive my cars and just got back from a 1,263 mile 6 day trip in m=
y original owner 1973 MGB with 229,000 miles on the car.=20

Things to consider: 1966 MK1A with 289 HiPo motor with about 300 HP and est=
imated 9.4.1 compression=20

600 cfm 4 barrel Holley carburetor=20

Headers with 2.25=E2=80=9D exhaust=20

15=E2=80=9D wheels running 205\50 x 15 tires=20

Wide ratio top loader 4 speed transmission=20

Closed, open, locked, posi, ratios =E2=80=93 the list is endless. What I am=
 looking for is a very streetable around town and on the highway posi rear =
end ratio that will work well with a good balance between acceleration for =
fun and highway cruising. I am not there yet. I have the acceleration for f=
un part in place but not the highway cruising (of course - avoid highways\i=
nterstate).=20

Data means a lot regarding RPM=E2=80=99s at speeds between 50 to 80 mph. Th=
ose of you who have switched ratios, please share your pros and cons.=20

Thank you for your input.=20

Regards=20

Joel Martin=20

_______________________________________________ [ mailto:[email-masked].=
net | [email-masked] ] Donate: [ http://www.team.net/donate.html | h=
ttp://www.team.net/donate.html ] Archive: [ http://www.team.net/pipermail/t=
igers | http://www.team.net/pipermail/tigers ] [ http://autox.team.net/arch=
ive | http://autox.team.net/archive ] Unsubscribe: [ http://autox.team.net/=
mailman/options/tigers/[email-masked] | http://autox.team.net/mail=
man/options/tigers/[email-masked] ]=20

_______________________________________________=20

[email-masked]=20

Archive: http://www.team.net/pipermail/tigers http://autox.team.net/archive=
=20

Unsubscribe: http://autox.team.net/mailman/options/tigers/[email-masked]=20

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<html><body><div style=3D"font-family: arial, helvetica, sans-serif; font-s=
ize: 10pt; color: #000000"><div>Didn't the axle spline count change at some=
 point? So you can do the conversion but there are a few extra tweaks neces=
sary, possibly up to and including the installation of new axles.</div><div=
><br data-mce-bogus=3D"1"></div><div>IIRC most of the period posi conversio=
ns were done using a Jaguar differential assembly. Then there is something =
that sticks in my mind where the original ring gear bolts are smaller than =
what is being used now. So if you're using a modern posi unit then you have=
 to use stepped ring gear bolts.</div><div><br data-mce-bogus=3D"1"></div><=
div>My Tiger has the 3.31 gears (and a Torsen LSD) and it spins at about 30=
00 RPM at 60 MPH, in fourth. The five speed makes it livable but first gear=
 is really short. Still need to change it over to the Z ratios.</div><div><=
br data-mce-bogus=3D"1"></div><div>-Theo</div><div><br data-mce-bogus=3D"1"=
></div><div><br data-mce-bogus=3D"1"></div><div><br data-mce-bogus=3D"1"></=
div><div><br></div><hr id=3D"zwchr" data-marker=3D"__DIVIDER__"><div data-m=
arker=3D"__HEADERS__"><b>From: </b>"tigers" &lt;[email-masked]&gt;<b=
r><b>To: </b>"Joel Martin" &lt;[email-masked]&gt;, "tigers" &lt;tiger=
[email-masked]&gt;<br><b>Sent: </b>Saturday, November 16, 2019 9:16:34 AM=
<br><b>Subject: </b>Re: [Tigers] Tiger Differential<br></div><div><br></div=
><div data-marker=3D"__QUOTED_TEXT__">Stock rear end is NOT posi.&nbsp; It =
is now called Dana44, same diff as a
    lot of 4x4 front as well as others.<br>
    A normal rear end shop can put posi in if someone didn't do yours
    before.<br>
    Axles, bearings, hubs are unique Tiger.<br>
    Stock is about 2450RPM at 60, way too fast unless you have a big cam
    IMHO.<br>
    Big carb, hopped up 289, you probably get 14mpg highway?&nbsp; Ouch.<br=
    I have a stock 5.0L/T-5 wide ratio..&nbsp; maybe 220HP, 14in wheels
    =3D1950RPM at 70.. NICE.&nbsp; Like a modern car<br>
    MPG &gt; 20 but&nbsp; not sure..<br>
    Good luck,<br>
    Gary<br>
    <br>
    <br>
    <div class=3D"moz-cite-prefix">On 11/16/2019 8:02 AM, Joel Martin via
      Tigers wrote:<br>
    </div>
    <blockquote cite=3D"mid:[email-masked]">
     =20
      <div class=3D"yahoo-style-wrap" style=3D"font-family:garamond, new
        york, times, serif;font-size:16px;">
        <div>
          <div>
            <p class=3D"ydpe3a33268MsoNormal">The manual shows that Tiger
              rear ends are:<span>&nbsp; </span>Salisbury hypoid =E2=80=984=
.HA=E2=80=99 with
              a 2.88 to 1
              ratio.<span>&nbsp; </span>What does the 4.HA stand for?</p>
            <p class=3D"ydpe3a33268MsoNormal">My understanding is these
              are posi traction meaning both
              wheels are applying power.</p>
            <p class=3D"ydpe3a33268MsoNormal">Those of you with 2.88 rear
              ratio gears, wide ratio 4 speed
              top loader transmissions, what is your RPM=E2=80=99s in fourt=
h at
              50, 60,70 &amp; 80
              MPH?&nbsp;
            </p>
            <p class=3D"ydpe3a33268MsoNormal">Those of you running other
              rear end rations, other factors
              the same, what are your RPM=E2=80=99s at the same speed and w=
hat
              ratio?</p>
            <p class=3D"ydpe3a33268MsoNormal">I like to drive my cars and
              just got back from a 1,263 mile
              6 day trip in my original owner 1973 MGB with 229,000
              miles on the car.&nbsp;
            </p>
            <p class=3D"ydpe3a33268MsoNormal">Things to consider:<span>&nbs=
p;
              </span>1966 MK1A with 289 HiPo motor with about 300 HP and
              estimated 9.4.1 compression</p>
            <p class=3D"ydpe3a33268MsoNormal">600 cfm 4 barrel Holley
              carburetor</p>
            <p class=3D"ydpe3a33268MsoNormal">Headers with 2.25=E2=80=9D ex=
haust</p>
            <p class=3D"ydpe3a33268MsoNormal">15=E2=80=9D wheels running 20=
5\50 x
              15 tires</p>
            <p class=3D"ydpe3a33268MsoNormal">Wide ratio top loader 4
              speed transmission</p>
            <p class=3D"ydpe3a33268MsoNormal">Believe Salisbury posi rear
              end </p>
            <p class=3D"ydpe3a33268MsoNormal">Closed, open, locked, posi,
              ratios =E2=80=93 the list is
              endless.<span>&nbsp; </span>What I am looking for is a
              very streetable around town and on the highway posi rear
              end ratio that will
              work well with a good balance between acceleration for fun
              and highway
              cruising.<span>&nbsp; </span>I am not there yet.&nbsp; I have=
 the
              acceleration for fun part in place but not the highway
              cruising (of course - avoid highways\interstate).<br>
            </p>
            <p class=3D"ydpe3a33268MsoNormal">Data means a lot regarding
              RPM=E2=80=99s at speeds between 50 to 80
              mph.<span>&nbsp; </span>Those of you who have switched
              ratios, please share your pros and cons.</p>
            <p class=3D"ydpe3a33268MsoNormal">Thank you for your input.</p>
            <p class=3D"ydpe3a33268MsoNormal">Regards</p>
            <p class=3D"ydpe3a33268MsoNormal">Joel Martin</p>
          </div>
          <br>
        </div>
      </div>
      <br>
      <fieldset class=3D"mimeAttachmentHeader"></fieldset>
      <pre class=3D"moz-quote-pre">________________________________________=
_______

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</pre>
    </blockquote>
    <br>
 =20

<br>_______________________________________________<br><br>[email-masked]=
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--===============7833926197369534245==
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[email-masked]

--===============7833926197369534245==--

---

From: Jim B via Tigers <[email-masked]>
Date: Sat, 16 Nov 2019 10:38:28 -0800

--===============3056134462633372076==
	boundary="Apple-Mail=_5C104E44-A6B4-4EA1-84B4-01BD1161DB7B"

--Apple-Mail=_5C104E44-A6B4-4EA1-84B4-01BD1161DB7B
Content-Transfer-Encoding: quoted-printable
	charset=utf-8

I have a T5 with 3.31:1 gears. Runs around 2200 rpm at 70 mph. I=E2=80=99m=
 using a Torsen type LSD with 28 spline axles from Sunbeam =
Specificities. I used a TruTrac diff. But there are others.

If keeping the 4 speed, I=E2=80=99d suggest using one of the online =
calculators to determine engine RPM at various speeds with various rear =
gears. Maybe a 3.00:1 ? Lot=E2=80=99s of choices.=20

> On Nov 16, 2019, at 8:47 AM, Theo Smit via Tigers =
<[email-masked]> wrote:
>=20
> Didn't the axle spline count change at some point? So you can do the =
conversion but there are a few extra tweaks necessary, possibly up to =
and including the installation of new axles.
>=20
> IIRC most of the period posi conversions were done using a Jaguar =
differential assembly. Then there is something that sticks in my mind =
where the original ring gear bolts are smaller than what is being used =
now. So if you're using a modern posi unit then you have to use stepped =
ring gear bolts.
>=20
> My Tiger has the 3.31 gears (and a Torsen LSD) and it spins at about =
3000 RPM at 60 MPH, in fourth. The five speed makes it livable but first =
gear is really short. Still need to change it over to the Z ratios.
>=20
> -Theo
>=20
>=20
>=20
>=20
> To: "Joel Martin" <[email-masked] =
> Sent: Saturday, November 16, 2019 9:16:34 AM
> Stock rear end is NOT posi.  It is now called Dana44, same diff as a =
lot of 4x4 front as well as others.
> A normal rear end shop can put posi in if someone didn't do yours =
before.
> Stock is about 2450RPM at 60, way too fast unless you have a big cam =
IMHO.
> I have a stock 5.0L/T-5 wide ratio..  maybe 220HP, 14in wheels =
=3D1950RPM at 70.. NICE.  Like a modern car
> The manual shows that Tiger rear ends are:  Salisbury hypoid =
=E2=80=984.HA=E2=80=99 with a 2.88 to 1 ratio.  What does the 4.HA stand =
for?
>=20
> My understanding is these are posi traction meaning both wheels are =
applying power.
>=20
> Those of you with 2.88 rear ratio gears, wide ratio 4 speed top loader =
transmissions, what is your RPM=E2=80=99s in fourth at 50, 60,70 & 80 =
MPH?=20
>=20
> Those of you running other rear end rations, other factors the same, =
what are your RPM=E2=80=99s at the same speed and what ratio?
>=20
> I like to drive my cars and just got back from a 1,263 mile 6 day trip =
in my original owner 1973 MGB with 229,000 miles on the car.=20
>=20
> Things to consider:  1966 MK1A with 289 HiPo motor with about 300 HP =
and estimated 9.4.1 compression
> Closed, open, locked, posi, ratios =E2=80=93 the list is endless.  =
What I am looking for is a very streetable around town and on the =
highway posi rear end ratio that will work well with a good balance =
between acceleration for fun and highway cruising.  I am not there yet.  =
I have the acceleration for fun part in place but not the highway =
cruising (of course - avoid highways\interstate).
>=20
> Data means a lot regarding RPM=E2=80=99s at speeds between 50 to 80 =
mph.  Those of you who have switched ratios, please share your pros and =
cons.
> Donate: http://www.team.net/donate.html =
<http://www.team.net/donate.html>
> Archive: http://www.team.net/pipermail/tigers =
<http://www.team.net/pipermail/tigers> http://autox.team.net/archive =
<http://autox.team.net/archive>
> Unsubscribe: =
http://autox.team.net/mailman/options/tigers/[email-masked] =
<http://autox.team.net/mailman/options/tigers/[email-masked]>
> Archive: http://www.team.net/pipermail/tigers =
http://autox.team.net/archive
> Unsubscribe: =
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Content-Transfer-Encoding: quoted-printable
	charset=utf-8

<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D"">I =
have a T5 with 3.31:1 gears. Runs around 2200 rpm at 70 mph. I=E2=80=99m =
using a Torsen type LSD with 28 spline axles from Sunbeam Specificities. =
I used a TruTrac diff. But there are others.<div class=3D""><br =
class=3D""></div><div class=3D"">If keeping the 4 speed, I=E2=80=99d =
suggest using one of the online calculators to determine engine RPM at =
various speeds with various rear gears. Maybe a 3.00:1 ? Lot=E2=80=99s =
of choices.&nbsp;<br class=3D""><div><br class=3D""><blockquote =
type=3D"cite" class=3D""><div class=3D"">On Nov 16, 2019, at 8:47 AM, =
Theo Smit via Tigers &lt;<a href=3D"mailto:[email-masked]" =
class=3D"">[email-masked]</a>&gt; wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><div =
style=3D"font-style: normal; font-variant-caps: normal; font-weight: =
normal; letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; text-decoration: none; font-family: =
arial, helvetica, sans-serif; font-size: 10pt;" class=3D""><div =
class=3D"">Didn't the axle spline count change at some point? So you can =
do the conversion but there are a few extra tweaks necessary, possibly =
up to and including the installation of new axles.</div><div =
class=3D""><br data-mce-bogus=3D"1" class=3D""></div><div class=3D"">IIRC =
most of the period posi conversions were done using a Jaguar =
differential assembly. Then there is something that sticks in my mind =
where the original ring gear bolts are smaller than what is being used =
now. So if you're using a modern posi unit then you have to use stepped =
ring gear bolts.</div><div class=3D""><br data-mce-bogus=3D"1" =
class=3D""></div><div class=3D"">My Tiger has the 3.31 gears (and a =
Torsen LSD) and it spins at about 3000 RPM at 60 MPH, in fourth. The =
five speed makes it livable but first gear is really short. Still need =
to change it over to the Z ratios.</div><div class=3D""><br =
data-mce-bogus=3D"1" class=3D""></div><div class=3D"">-Theo</div><div =
class=3D""><br data-mce-bogus=3D"1" class=3D""></div><div class=3D""><br =
data-mce-bogus=3D"1" class=3D""></div><div class=3D""><br =
data-mce-bogus=3D"1" class=3D""></div><div class=3D""><br =
class=3D""></div><hr id=3D"zwchr" data-marker=3D"__DIVIDER__" =
class=3D""><div data-marker=3D"__HEADERS__" class=3D""><b =
class=3D"">From:<span =
class=3D"Apple-converted-space">&nbsp;</span></b>"tigers" &lt;<a =
href=3D"mailto:[email-masked]" =
class=3D"">[email-masked]</a>&gt;<br class=3D""><b =
class=3D"">To:<span class=3D"Apple-converted-space">&nbsp;</span></b>"Joel=
 Martin" &lt;<a href=3D"mailto:[email-masked]" =
class=3D"">[email-masked]</a>&gt;, "tigers" &lt;<a =
href=3D"mailto:[email-masked]" =
class=3D"">[email-masked]</a>&gt;<br class=3D""><b =
class=3D"">Sent:<span =
class=3D"Apple-converted-space">&nbsp;</span></b>Saturday, November 16, =
2019 9:16:34 AM<br class=3D""><b class=3D"">Subject:<span =
class=3D"Apple-converted-space">&nbsp;</span></b>Re: [Tigers] Tiger =
Differential<br class=3D""></div><div class=3D""><br class=3D""></div><div=
 data-marker=3D"__QUOTED_TEXT__" class=3D"">Stock rear end is NOT =
posi.&nbsp; It is now called Dana44, same diff as a lot of 4x4 front as =
well as others.<br class=3D"">A normal rear end shop can put posi in if =
someone didn't do yours before.<br class=3D"">Axles, bearings, hubs are =
unique Tiger.<br class=3D"">Stock is about 2450RPM at 60, way too fast =
unless you have a big cam IMHO.<br class=3D"">Big carb, hopped up 289, =
you probably get 14mpg highway?&nbsp; Ouch.<br class=3D"">I have a stock =
5.0L/T-5 wide ratio..&nbsp; maybe 220HP, 14in wheels =3D1950RPM at 70.. =
NICE.&nbsp; Like a modern car<br class=3D"">MPG &gt; 20 but&nbsp; not =
sure..<br class=3D"">Good luck,<br class=3D"">Gary<br class=3D""><br =
class=3D""><br class=3D""><div class=3D"moz-cite-prefix">On 11/16/2019 =
8:02 AM, Joel Martin via Tigers wrote:<br class=3D""></div><blockquote =
cite=3D"mid:[email-masked]" class=3D""><div=
 class=3D"yahoo-style-wrap" style=3D"font-family: garamond, &quot;new =
york&quot;, times, serif; font-size: 16px;"><div class=3D""><div =
class=3D""><p class=3D"ydpe3a33268MsoNormal">The manual shows that Tiger =
rear ends are:<span class=3D"">&nbsp;<span =
class=3D"Apple-converted-space">&nbsp;</span></span>Salisbury hypoid =
=E2=80=984.HA=E2=80=99 with a 2.88 to 1 ratio.<span class=3D"">&nbsp;<span=
 class=3D"Apple-converted-space">&nbsp;</span></span>What does the 4.HA =
stand for?</p><p class=3D"ydpe3a33268MsoNormal">My understanding is =
these are posi traction meaning both wheels are applying power.</p><p =
class=3D"ydpe3a33268MsoNormal">Those of you with 2.88 rear ratio gears, =
wide ratio 4 speed top loader transmissions, what is your RPM=E2=80=99s =
in fourth at 50, 60,70 &amp; 80 MPH?&nbsp;</p><p =
class=3D"ydpe3a33268MsoNormal">Those of you running other rear end =
rations, other factors the same, what are your RPM=E2=80=99s at the same =
speed and what ratio?</p><p class=3D"ydpe3a33268MsoNormal">I like to =
drive my cars and just got back from a 1,263 mile 6 day trip in my =
original owner 1973 MGB with 229,000 miles on the car.&nbsp;</p><p =
class=3D"ydpe3a33268MsoNormal">Things to consider:<span =
class=3D"">&nbsp;<span =
class=3D"Apple-converted-space">&nbsp;</span></span>1966 MK1A with 289 =
HiPo motor with about 300 HP and estimated 9.4.1 compression</p><p =
class=3D"ydpe3a33268MsoNormal">600 cfm 4 barrel Holley carburetor</p><p =
class=3D"ydpe3a33268MsoNormal">Headers with 2.25=E2=80=9D exhaust</p><p =
class=3D"ydpe3a33268MsoNormal">15=E2=80=9D wheels running 205\50 x 15 =
tires</p><p class=3D"ydpe3a33268MsoNormal">Wide ratio top loader 4 speed =
transmission</p><p class=3D"ydpe3a33268MsoNormal">Believe Salisbury posi =
rear end</p><p class=3D"ydpe3a33268MsoNormal">Closed, open, locked, =
posi, ratios =E2=80=93 the list is endless.<span class=3D"">&nbsp;<span =
class=3D"Apple-converted-space">&nbsp;</span></span>What I am looking =
for is a very streetable around town and on the highway posi rear end =
ratio that will work well with a good balance between acceleration for =
fun and highway cruising.<span class=3D"">&nbsp;<span =
class=3D"Apple-converted-space">&nbsp;</span></span>I am not there =
yet.&nbsp; I have the acceleration for fun part in place but not the =
highway cruising (of course - avoid highways\interstate).<br =
class=3D""></p><p class=3D"ydpe3a33268MsoNormal">Data means a lot =
regarding RPM=E2=80=99s at speeds between 50 to 80 mph.<span =
class=3D"">&nbsp;<span =
class=3D"Apple-converted-space">&nbsp;</span></span>Those of you who =
have switched ratios, please share your pros and cons.</p><p =
class=3D"ydpe3a33268MsoNormal">Thank you for your input.</p><p =
class=3D"ydpe3a33268MsoNormal">Regards</p><p =
class=3D"ydpe3a33268MsoNormal">Joel Martin</p></div><br =
class=3D""></div></div><br class=3D""><fieldset =
class=3D"mimeAttachmentHeader"></fieldset><pre =
class=3D"moz-quote-pre">_______________________________________________

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</pre></blockquote><br class=3D""><br =
class=3D"">_______________________________________________<br =
class=3D""><br class=3D""><a href=3D"mailto:[email-masked]" =
class=3D"">[email-masked]</a><br class=3D""><br class=3D"">Donate: =
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[email-masked]

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---

From: "e.coiner e.coiner via Tigers" <[email-masked]>
Date: Sat, 16 Nov 2019 14:55:10 -0500 (EST)

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My Tiger came with close ratio box and 3.07:1 gears.  It spun 3500 rpm at 7=
5 mph.  I drove it from San Diego to Monterey on several occasions.  It nev=
er had any trouble. =20

I replaced the close ratio with wide ratio gears for better launch.

Most recently I replaced the rear end gears with 2.72:1 gears from a Jeep W=
agoneer.  75 mph is now a more reasonable 3100.

> On November 16, 2019 at 11:47 AM Theo Smit via Tigers <[email-masked].=
>     Didn't the axle spline count change at some point? So you can do the =
conversion but there are a few extra tweaks necessary, possibly up to and i=
ncluding the installation of new axles.
>=20
>     IIRC most of the period posi conversions were done using a Jaguar dif=
ferential assembly. Then there is something that sticks in my mind where th=
e original ring gear bolts are smaller than what is being used now. So if y=
ou're using a modern posi unit then you have to use stepped ring gear bolts=
.
>     My Tiger has the 3.31 gears (and a Torsen LSD) and it spins at about =
3000 RPM at 60 MPH, in fourth. The five speed makes it livable but first ge=
ar is really short. Still need to change it over to the Z ratios.
>=20
>     -Theo
>=20
>=20
>=20
>=20
>=20
>     ---------------------------------------------
>     From: "tigers" <[email-masked]>
>     To: "Joel Martin" <[email-masked]>, "tigers" <[email-masked]=
.net>
>     A normal rear end shop can put posi in if someone didn't do yours bef=
ore.
IMHO.
>     I have a stock 5.0L/T-5 wide ratio..  maybe 220HP, 14in wheels =3D195=
0RPM at 70.. NICE.  Like a modern car
> >         The manual shows that Tiger rear ends are:  Salisbury hypoid =
=E2=80=984.HA=E2=80=99 with a 2.88 to 1 ratio.  What does the 4.HA stand fo=
r?
> >=20
> >         My understanding is these are posi traction meaning both wheels=
 are applying power.
> >=20
> >         Those of you with 2.88 rear ratio gears, wide ratio 4 speed top=
 loader transmissions, what is your RPM=E2=80=99s in fourth at 50, 60,70 & =
80 MPH?=20
> >=20
> >         Those of you running other rear end rations, other factors the =
same, what are your RPM=E2=80=99s at the same speed and what ratio?
> >=20
> >         I like to drive my cars and just got back from a 1,263 mile 6 d=
ay trip in my original owner 1973 MGB with 229,000 miles on the car.=20
> >=20
> >         Things to consider:  1966 MK1A with 289 HiPo motor with about 3=
00 HP and estimated 9.4.1 compression
> >         Closed, open, locked, posi, ratios =E2=80=93 the list is endles=
s.  What I am looking for is a very streetable around town and on the highw=
ay posi rear end ratio that will work well with a good balance between acce=
leration for fun and highway cruising.  I am not there yet.  I have the acc=
eleration for fun part in place but not the highway cruising (of course - a=
void highways\interstate).
> >=20
> >         Data means a lot regarding RPM=E2=80=99s at speeds between 50 t=
o 80 mph.  Those of you who have switched ratios, please share your pros an=
d cons.
> >         [email-masked] mailto:[email-masked]
> >=20
> >         Archive: http://www.team.net/pipermail/tigers http://autox.team=
.net/archive
> >=20
> >         Unsubscribe: http://autox.team.net/mailman/options/tigers/garyw=
[email-masked]
>     Archive: http://www.team.net/pipermail/tigers http://autox.team.net/a=
rchive
>=20
>     Unsubscribe: http://autox.team.net/mailman/options/tigers/tsmit@shaw.=
ca

=20

>     Archive: http://www.team.net/pipermail/tigers http://autox.team.net/a=
rchive
>=20
>     Unsubscribe: http://autox.team.net/mailman/options/tigers/e.coiner@co=
x.net

=20

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<!DOCTYPE html>
<html><head>
    <meta charset=3D"UTF-8">
</head><body><p>My Tiger came with close ratio box and 3.07:1 gears.&#160; =
It spun 3500 rpm at 75 mph.&#160; I drove it from San Diego to Monterey on =
several occasions.&#160; It never had any trouble. &#160;</p><p>I replaced =
the close ratio with wide ratio gears for better launch.</p><p>Most recentl=
y I replaced the rear end gears with 2.72:1 gears from a Jeep Wagoneer.&#16=
0; 75 mph is now a more reasonable 3100.</p><p><br></p><blockquote type=3D"=
cite">On November 16, 2019 at 11:47 AM Theo Smit via Tigers &#60;tigers@aut=
ox.team.net&#62; wrote: <br> <br><div style=3D"font-family: arial, helvetic=
a, sans-serif; font-size: 10pt; color: #000000;"><div>Didn&#39;t the axle s=
pline count change at some point? So you can do the conversion but there ar=
e a few extra tweaks necessary, possibly up to and including the installati=
on of new axles.</div><div><br></div><div>IIRC most of the period posi conv=
ersions were done using a Jaguar differential assembly. Then there is somet=
hing that sticks in my mind where the original ring gear bolts are smaller =
than what is being used now. So if you&#39;re using a modern posi unit then=
 you have to use stepped ring gear bolts.</div><div><br></div><div>My Tiger=
 has the 3.31 gears (and a Torsen LSD) and it spins at about 3000 RPM at 60=
 MPH, in fourth. The five speed makes it livable but first gear is really s=
hort. Still need to change it over to the Z ratios.</div><div><br></div><di=
v>-Theo</div><div><br></div><div><br></div><div><br></div><div><br></div><h=
r id=3D"ox-68ab5d5c67-zwchr"><div><strong>From: </strong>&#34;tigers&#34; &=
#60;[email-masked]&#62; <br> <strong>To: </strong>&#34;Joel Martin&#=
34; &#60;[email-masked]&#62;, &#34;tigers&#34; &#60;[email-masked]=
.net&#62; <br> <strong>Sent: </strong>Saturday, November 16, 2019 9:16:34 A=
M <br> <strong>Subject: </strong>Re: [Tigers] Tiger Differential <br></div>=
<div><br></div><div>Stock rear end is NOT posi.&#160; It is now called Dana=
44, same diff as a lot of 4x4 front as well as others. <br> A normal rear e=
nd shop can put posi in if someone didn&#39;t do yours before. <br> Axles, =
bearings, hubs are unique Tiger. <br> Stock is about 2450RPM at 60, way too=
 fast unless you have a big cam IMHO. <br> Big carb, hopped up 289, you pro=
bably get 14mpg highway?&#160; Ouch. <br> I have a stock 5.0L/T-5 wide rati=
o..&#160; maybe 220HP, 14in wheels =3D1950RPM at 70.. NICE.&#160; Like a mo=
dern car <br> MPG &#62; 20 but&#160; not sure.. <br> Good luck, <br> Gary <=
br> <br> <br><div class=3D"ox-68ab5d5c67-moz-cite-prefix">On 11/16/2019 8:0=
2 AM, Joel Martin via Tigers wrote: <br></div><blockquote><div class=3D"ox-=
68ab5d5c67-yahoo-style-wrap" style=3D"font-family: garamond, new; font-size=
: 16px;"><div><div><p class=3D"ox-68ab5d5c67-ydpe3a33268MsoNormal">The manu=
al shows that Tiger rear ends are:&#160; Salisbury hypoid &#8216;4.HA&#8217=
; with a 2.88 to 1 ratio.&#160; What does the 4.HA stand for?</p><p class=
=3D"ox-68ab5d5c67-ydpe3a33268MsoNormal">My understanding is these are posi =
traction meaning both wheels are applying power.</p><p class=3D"ox-68ab5d5c=
67-ydpe3a33268MsoNormal">Those of you with 2.88 rear ratio gears, wide rati=
o 4 speed top loader transmissions, what is your RPM&#8217;s in fourth at 5=
0, 60,70 &#38; 80 MPH?&#160;</p><p class=3D"ox-68ab5d5c67-ydpe3a33268MsoNor=
mal">Those of you running other rear end rations, other factors the same, w=
hat are your RPM&#8217;s at the same speed and what ratio?</p><p class=3D"o=
x-68ab5d5c67-ydpe3a33268MsoNormal">I like to drive my cars and just got bac=
k from a 1,263 mile 6 day trip in my original owner 1973 MGB with 229,000 m=
iles on the car.&#160;</p><p class=3D"ox-68ab5d5c67-ydpe3a33268MsoNormal">T=
hings to consider:&#160; 1966 MK1A with 289 HiPo motor with about 300 HP an=
d estimated 9.4.1 compression</p><p class=3D"ox-68ab5d5c67-ydpe3a33268MsoNo=
rmal">600 cfm 4 barrel Holley carburetor</p><p class=3D"ox-68ab5d5c67-ydpe3=
a33268MsoNormal">Headers with 2.25&#8221; exhaust</p><p class=3D"ox-68ab5d5=
c67-ydpe3a33268MsoNormal">15&#8221; wheels running 205\50 x 15 tires</p><p =
class=3D"ox-68ab5d5c67-ydpe3a33268MsoNormal">Wide ratio top loader 4 speed =
transmission</p><p class=3D"ox-68ab5d5c67-ydpe3a33268MsoNormal">Believe Sal=
isbury posi rear end</p><p class=3D"ox-68ab5d5c67-ydpe3a33268MsoNormal">Clo=
sed, open, locked, posi, ratios &#8211; the list is endless.&#160; What I a=
m looking for is a very streetable around town and on the highway posi rear=
 end ratio that will work well with a good balance between acceleration for=
 fun and highway cruising.&#160; I am not there yet.&#160; I have the accel=
eration for fun part in place but not the highway cruising (of course - avo=
id highways\interstate).<br></p><p class=3D"ox-68ab5d5c67-ydpe3a33268MsoNor=
mal">Data means a lot regarding RPM&#8217;s at speeds between 50 to 80 mph.=
&#160; Those of you who have switched ratios, please share your pros and co=
ns.</p><p class=3D"ox-68ab5d5c67-ydpe3a33268MsoNormal">Thank you for your i=
nput.</p><p class=3D"ox-68ab5d5c67-ydpe3a33268MsoNormal">Regards</p><p clas=
s=3D"ox-68ab5d5c67-ydpe3a33268MsoNormal">Joel Martin</p></div><br></div></d=
iv><br><pre class=3D"ox-68ab5d5c67-moz-quote-pre">_________________________=
______________________

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</pre></blockquote><br> <br>_______________________________________________=
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---

From: twotigers--- via Tigers <[email-masked]>
Date: Sat, 16 Nov 2019 13:15:44 -0800

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I have 2:88 with 205/60-13 tires- runs 3000 rpms at 70 mph.  Kirk

=20

From: Tigers <[email-masked]> On Behalf Of Joel Martin =
via Tigers
Sent: Saturday, November 16, 2019 8:03 AM
To: Tiger List Serve <[email-masked]>
Subject: [Tigers] Tiger Differential

=20

MPH? =20

I like to drive my cars and just got back from a 1,263 mile 6 day trip =
in my original owner 1973 MGB with 229,000 miles on the car. =20

Things to consider:  1966 MK1A with 289 HiPo motor with about 300 HP and =
estimated 9.4.1 compression

Closed, open, locked, posi, ratios =E2=80=93 the list is endless.  What =
I am looking for is a very streetable around town and on the highway =
posi rear end ratio that will work well with a good balance between =
acceleration for fun and highway cruising.  I am not there yet.  I have =
the acceleration for fun part in place but not the highway cruising (of =
course - avoid highways\interstate).

Data means a lot regarding RPM=E2=80=99s at speeds between 50 to 80 mph. =
 Those of you who have switched ratios, please share your pros and cons.

Regards

Joel Martin

=20

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link=3D"#0563C1" vlink=3D"#954F72"><div class=3DWordSection1><p =
class=3DMsoNormal>I have 2:88 with 205/60-13 tires- runs 3000 rpms at 70 =
mph.=C2=A0 Kirk<o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><div =
style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in'><p class=3DMsoNormal><b>From:</b> Tigers =
&lt;[email-masked]&gt; <b>On Behalf Of </b>Joel Martin =
via Tigers<br><b>Sent:</b> Saturday, November 16, 2019 8:03 =
AM<br><b>To:</b> Tiger List Serve =
&lt;[email-masked]&gt;<br><b>Subject:</b> [Tigers] Tiger =
Differential<o:p></o:p></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><div><div><p =
class=3Dydpe3a33268msonormal><span =
style=3D'font-size:12.0pt;font-family:"Garamond",serif'>The manual shows =
that Tiger rear ends are:&nbsp; Salisbury hypoid =E2=80=984.HA=E2=80=99 =
with a 2.88 to 1 ratio.&nbsp; What does the 4.HA stand =
for?<o:p></o:p></span></p><p class=3Dydpe3a33268msonormal><span =
style=3D'font-size:12.0pt;font-family:"Garamond",serif'>My understanding =
is these are posi traction meaning both wheels are applying =
power.<o:p></o:p></span></p><p class=3Dydpe3a33268msonormal><span =
style=3D'font-size:12.0pt;font-family:"Garamond",serif'>Those of you =
with 2.88 rear ratio gears, wide ratio 4 speed top loader transmissions, =
what is your RPM=E2=80=99s in fourth at 50, 60,70 &amp; 80 MPH?&nbsp; =
<o:p></o:p></span></p><p class=3Dydpe3a33268msonormal><span =
style=3D'font-size:12.0pt;font-family:"Garamond",serif'>Those of you =
running other rear end rations, other factors the same, what are your =
RPM=E2=80=99s at the same speed and what ratio?<o:p></o:p></span></p><p =
class=3Dydpe3a33268msonormal><span =
style=3D'font-size:12.0pt;font-family:"Garamond",serif'>I like to drive =
my cars and just got back from a 1,263 mile 6 day trip in my original =
owner 1973 MGB with 229,000 miles on the car.&nbsp; =
<o:p></o:p></span></p><p class=3Dydpe3a33268msonormal><span =
style=3D'font-size:12.0pt;font-family:"Garamond",serif'>Things to =
consider:&nbsp; 1966 MK1A with 289 HiPo motor with about 300 HP and =
estimated 9.4.1 compression<o:p></o:p></span></p><p =
class=3Dydpe3a33268msonormal><span =
style=3D'font-size:12.0pt;font-family:"Garamond",serif'>600 cfm 4 barrel =
Holley carburetor<o:p></o:p></span></p><p =
class=3Dydpe3a33268msonormal><span =
style=3D'font-size:12.0pt;font-family:"Garamond",serif'>Headers with =
2.25=E2=80=9D exhaust<o:p></o:p></span></p><p =
class=3Dydpe3a33268msonormal><span =
style=3D'font-size:12.0pt;font-family:"Garamond",serif'>15=E2=80=9D =
wheels running 205\50 x 15 tires<o:p></o:p></span></p><p =
class=3Dydpe3a33268msonormal><span =
style=3D'font-size:12.0pt;font-family:"Garamond",serif'>Wide ratio top =
loader 4 speed transmission<o:p></o:p></span></p><p =
class=3Dydpe3a33268msonormal><span =
style=3D'font-size:12.0pt;font-family:"Garamond",serif'>Believe =
Salisbury posi rear end <o:p></o:p></span></p><p =
class=3Dydpe3a33268msonormal><span =
style=3D'font-size:12.0pt;font-family:"Garamond",serif'>Closed, open, =
locked, posi, ratios =E2=80=93 the list is endless.&nbsp; What I am =
looking for is a very streetable around town and on the highway posi =
rear end ratio that will work well with a good balance between =
acceleration for fun and highway cruising.&nbsp; I am not there =
yet.&nbsp; I have the acceleration for fun part in place but not the =
highway cruising (of course - avoid =
highways\interstate).<o:p></o:p></span></p><p =
class=3Dydpe3a33268msonormal><span =
style=3D'font-size:12.0pt;font-family:"Garamond",serif'>Data means a lot =
regarding RPM=E2=80=99s at speeds between 50 to 80 mph.&nbsp; Those of =
you who have switched ratios, please share your pros and =
cons.<o:p></o:p></span></p><p class=3Dydpe3a33268msonormal><span =
style=3D'font-size:12.0pt;font-family:"Garamond",serif'>Thank you for =
your input.<o:p></o:p></span></p><p class=3Dydpe3a33268msonormal><span =
style=3D'font-size:12.0pt;font-family:"Garamond",serif'>Regards<o:p></o:p=
></span></p><p class=3Dydpe3a33268msonormal><span =
style=3D'font-size:12.0pt;font-family:"Garamond",serif'>Joel =
Martin<o:p></o:p></span></p></div><p class=3DMsoNormal><span =
style=3D'font-size:12.0pt;font-family:"Garamond",serif'><o:p>&nbsp;</o:p>=
</span></p></div></div></div></body></html>
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[email-masked]

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---

From: Michael Wood via Tigers <[email-masked]>
Date: Sat, 16 Nov 2019 16:52:39 +0000 (UTC)

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Easy enough to use the linked speed-in-gear RPM calculator to both answer t=
he original questions and model out different scenarios.=C2=A0

https://spicerparts.com/calculators/transmission-ratio-rpm-calculator

-----Original Message-----
From: Theo Smit via Tigers <[email-masked]>
To: Gary <[email-masked]>
Cc: Joel Martin <[email-masked]>; tigers <[email-masked]>
Sent: Sat, Nov 16, 2019 8:49 am
Subject: Re: [Tigers] Tiger Differential

Didn't the axle spline count change at some point? So you can do the conver=
sion but there are a few extra tweaks necessary, possibly up to and includi=
ng the installation of new axles.
IIRC most of the period posi conversions were done using a Jaguar different=
ial assembly. Then there is something that sticks in my mind where the orig=
inal ring gear bolts are smaller than what is being used now. So if you're =
using a modern posi unit then you have to use stepped ring gear bolts.
My Tiger has the 3.31 gears (and a Torsen LSD) and it spins at about 3000 R=
PM at 60 MPH, in fourth. The five speed makes it livable but first gear is =
really short. Still need to change it over to the Z ratios.
-Theo

From: "tigers" <[email-masked]>
To: "Joel Martin" <[email-masked]>, "tigers" <[email-masked]>
Sent: Saturday, November 16, 2019 9:16:34 AM
Subject: Re: [Tigers] Tiger Differential

Stock rear end is NOT posi.=C2=A0 It is now called Dana44, same diff as a l=
ot of 4x4 front as well as others.
 Big carb, hopped up 289, you probably get 14mpg highway?=C2=A0 Ouch.
 I have a stock 5.0L/T-5 wide ratio..=C2=A0 maybe 220HP, 14in wheels =3D195=
0RPM at 70.. NICE.=C2=A0 Like a modern car
 MPG > 20 but=C2=A0 not sure..
=A0=20
y original owner 1973 MGB with 229,000 miles on the car.=C2=A0=20

[email-masked]

Unsubscribe: http://autox.team.net/mailman/options/tigers/garywinblad@comca=
st.net

=20
=20
=20

[email-masked]

Unsubscribe: http://autox.team.net/mailman/options/tigers/[email-masked]
_______________________________________________

[email-masked]

Unsubscribe: http://autox.team.net/mailman/options/tigers/[email-masked]=
m

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<div style=3D"font-size:10pt;font-family:arial,helvetica,sans-serif;color:b=
lack;"><div style=3D"font-family:arial,helvetica,sans-serif;font-size:10pt;=
color:black;">Easy enough to use the linked speed-in-gear RPM calculator to=
 both answer the original questions and model out different scenarios.&nbsp=
;<br><br>https://spicerparts.com/calculators/transmission-ratio-rpm-calcula=
tor<br><br><br><br><br>-----Original Message-----<br>From: Theo Smit via Ti=
gers &lt;[email-masked]&gt;<br>To: Gary &lt;[email-masked]&=
gt;<br>Cc: Joel Martin &lt;[email-masked]&gt;; tigers &lt;tigers@auto=
x.team.net&gt;<br>Sent: Sat, Nov 16, 2019 8:49 am<br>Subject: Re: [Tigers] =
Tiger Differential<br><br></div><div id=3D"yiv2561994377"><div><div style=
=3D"font-family:arial, helvetica, sans-serif;font-size:10pt;color:#000000;"=
><div>Didn't the axle spline count change at some point? So you can do the =
conversion but there are a few extra tweaks necessary, possibly up to and i=
ncluding the installation of new axles.</div><div><br clear=3D"none"></div>=
<div>IIRC most of the period posi conversions were done using a Jaguar diff=
erential assembly. Then there is something that sticks in my mind where the=
 original ring gear bolts are smaller than what is being used now. So if yo=
u're using a modern posi unit then you have to use stepped ring gear bolts.=
</div><div><br clear=3D"none"></div><div>My Tiger has the 3.31 gears (and a=
 Torsen LSD) and it spins at about 3000 RPM at 60 MPH, in fourth. The five =
speed makes it livable but first gear is really short. Still need to change=
 it over to the Z ratios.</div><div><br clear=3D"none"></div><div>-Theo</di=
v><div><br clear=3D"none"></div><div><br clear=3D"none"></div><div><br clea=
r=3D"none"></div><div><br clear=3D"none"></div><hr id=3D"yiv2561994377zwchr=
"><div class=3D"yiv2561994377yqt2373198592" id=3D"yiv2561994377yqtfd29402">=
<div><b>From: </b>"tigers" &lt;[email-masked]&gt;<br clear=3D"none">=
<b>To: </b>"Joel Martin" &lt;[email-masked]&gt;, "tigers" &lt;tigers@=
autox.team.net&gt;<br clear=3D"none"><b>Sent: </b>Saturday, November 16, 20=
19 9:16:34 AM<br clear=3D"none"><b>Subject: </b>Re: [Tigers] Tiger Differen=
tial<br clear=3D"none"></div><div><br clear=3D"none"></div></div><div><div =
class=3D"yiv2561994377yqt2373198592" id=3D"yiv2561994377yqtfd86064">Stock r=
ear end is NOT posi.&nbsp; It is now called Dana44, same diff as a
    lot of 4x4 front as well as others.<br clear=3D"none">
    A normal rear end shop can put posi in if someone didn't do yours
    before.<br clear=3D"none">
    Axles, bearings, hubs are unique Tiger.<br clear=3D"none">
    Stock is about 2450RPM at 60, way too fast unless you have a big cam
    IMHO.<br clear=3D"none">
    Big carb, hopped up 289, you probably get 14mpg highway?&nbsp; Ouch.<br=
 clear=3D"none">
    I have a stock 5.0L/T-5 wide ratio..&nbsp; maybe 220HP, 14in wheels
    =3D1950RPM at 70.. NICE.&nbsp; Like a modern car<br clear=3D"none">
    MPG &gt; 20 but&nbsp; not sure..<br clear=3D"none">
    Good luck,<br clear=3D"none">
    Gary<br clear=3D"none">
    <br clear=3D"none">
    <br clear=3D"none">
    <div class=3D"yiv2561994377moz-cite-prefix">On 11/16/2019 8:02 AM, Joel=
 Martin via
      Tigers wrote:<br clear=3D"none">
    </div>
    <blockquote>
     =20
      <div class=3D"yiv2561994377yahoo-style-wrap" style=3D"font-family:gar=
amond, new york, times, serif;font-size:16px;">
        <div>
          <div>
            <p class=3D"yiv2561994377ydpe3a33268MsoNormal">The manual shows=
 that Tiger
              rear ends are:<span>&nbsp; </span>Salisbury hypoid =E2=80=984=
.HA=E2=80=99 with
              a 2.88 to 1
              ratio.<span>&nbsp; </span>What does the 4.HA stand for?</p>
            <p class=3D"yiv2561994377ydpe3a33268MsoNormal">My understanding=
 is these
              are posi traction meaning both
              wheels are applying power.</p>
            <p class=3D"yiv2561994377ydpe3a33268MsoNormal">Those of you wit=
h 2.88 rear
              ratio gears, wide ratio 4 speed
              top loader transmissions, what is your RPM=E2=80=99s in fourt=
h at
              50, 60,70 &amp; 80
              MPH?&nbsp;
            </p>
            <p class=3D"yiv2561994377ydpe3a33268MsoNormal">Those of you run=
ning other
              rear end rations, other factors
              the same, what are your RPM=E2=80=99s at the same speed and w=
hat
              ratio?</p>
            <p class=3D"yiv2561994377ydpe3a33268MsoNormal">I like to drive =
my cars and
              just got back from a 1,263 mile
              6 day trip in my original owner 1973 MGB with 229,000
              miles on the car.&nbsp;
            </p>
            <p class=3D"yiv2561994377ydpe3a33268MsoNormal">Things to consid=
er:<span>&nbsp;
              </span>1966 MK1A with 289 HiPo motor with about 300 HP and
              estimated 9.4.1 compression</p>
            <p class=3D"yiv2561994377ydpe3a33268MsoNormal">600 cfm 4 barrel=
 Holley
              carburetor</p>
            <p class=3D"yiv2561994377ydpe3a33268MsoNormal">Headers with 2.2=
5=E2=80=9D exhaust</p>
            <p class=3D"yiv2561994377ydpe3a33268MsoNormal">15=E2=80=9D whee=
ls running 205\50 x
              15 tires</p>
            <p class=3D"yiv2561994377ydpe3a33268MsoNormal">Wide ratio top l=
oader 4
              speed transmission</p>
            <p class=3D"yiv2561994377ydpe3a33268MsoNormal">Believe Salisbur=
y posi rear
              end </p>
            <p class=3D"yiv2561994377ydpe3a33268MsoNormal">Closed, open, lo=
cked, posi,
              ratios =E2=80=93 the list is
              endless.<span>&nbsp; </span>What I am looking for is a
              very streetable around town and on the highway posi rear
              end ratio that will
              work well with a good balance between acceleration for fun
              and highway
              cruising.<span>&nbsp; </span>I am not there yet.&nbsp; I have=
 the
              acceleration for fun part in place but not the highway
              cruising (of course - avoid highways\interstate).<br clear=3D=
"none">
            </p>
            <p class=3D"yiv2561994377ydpe3a33268MsoNormal">Data means a lot=
 regarding
              RPM=E2=80=99s at speeds between 50 to 80
              mph.<span>&nbsp; </span>Those of you who have switched
              ratios, please share your pros and cons.</p>
            <p class=3D"yiv2561994377ydpe3a33268MsoNormal">Thank you for yo=
ur input.</p>
            <p class=3D"yiv2561994377ydpe3a33268MsoNormal">Regards</p>
            <p class=3D"yiv2561994377ydpe3a33268MsoNormal">Joel Martin</p>
          </div>
          <br clear=3D"none">
        </div>
      </div>
      <br clear=3D"none">
      <fieldset class=3D"yiv2561994377mimeAttachmentHeader"></fieldset>
      <pre class=3D"yiv2561994377moz-quote-pre">___________________________=
____________________

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    </blockquote>
    <br clear=3D"none">
 =20

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