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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 <tigers@autox.team.=
net> 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 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=
.
>=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 ge=
ar is really short. Still need to change it over to the Z ratios.
>=20
> -Theo
>=20
>=20
>=20
>=20
>=20
> ---------------------------------------------
> From: "tigers" <tigers@autox.team.net>
> To: "Joel Martin" <jmartiniii@yahoo.com>, "tigers" <tigers@autox.team=
.net>
> Sent: Saturday, November 16, 2019 9:16:34 AM
> 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.
> A normal rear end shop can put posi in if someone didn't do yours bef=
ore.
> 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 =3D195=
0RPM at 70.. NICE. Like a modern car
> MPG > 20 but not sure..
> Good luck,
> Gary
>=20
>=20
> On 11/16/2019 8:02 AM, Joel Martin via Tigers wrote:
>=20
> > >=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 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
> >=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
> > Believe Salisbury posi rear end
> >=20
> > 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.
> >=20
> > Thank you for your input.
> >=20
> > Regards
> >=20
> > Joel Martin
> >=20
> >=20
> >=20
> > _______________________________________________
> >=20
> > tigers@autox.team.net mailto:tigers@autox.team.net
> >=20
> > Donate: http://www.team.net/donate.html
> > Archive: http://www.team.net/pipermail/tigers http://autox.team=
.net/archive
> >=20
> > Unsubscribe: http://autox.team.net/mailman/options/tigers/garyw=
inblad@comcast.net
> >=20
> >=20
> >=20
> > >=20
> _______________________________________________
>=20
> tigers@autox.team.net
>=20
> Donate: http://www.team.net/donate.html
> 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
=20
> _______________________________________________
>=20
> tigers@autox.team.net
>=20
> Donate: http://www.team.net/donate.html
> 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
>=20
>=20
=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.  =
It spun 3500 rpm at 75 mph.  I drove it from San Diego to Monterey on =
several occasions.  It never had any trouble.  </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.=
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 <tigers@aut=
ox.team.net> wrote: <br> <br><div style=3D"font-family: arial, helvetic=
a, sans-serif; font-size: 10pt; color: #000000;"><div>Didn'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'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>"tigers" &=
#60;tigers@autox.team.net> <br> <strong>To: </strong>"Joel Martin&#=
34; <jmartiniii@yahoo.com>, "tigers" <tigers@autox.team=
.net> <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.  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'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?  Ouch. <br> I have a stock 5.0L/T-5 wide rati=
o..  maybe 220HP, 14in wheels =3D1950RPM at 70.. NICE.  Like a mo=
dern car <br> MPG > 20 but  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:  Salisbury hypoid ‘4.HA’=
; with a 2.88 to 1 ratio.  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’s in fourth at 5=
0, 60,70 & 80 MPH? </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’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. </p><p class=3D"ox-68ab5d5c67-ydpe3a33268MsoNormal">T=
hings to consider:  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” exhaust</p><p class=3D"ox-68ab5d5=
c67-ydpe3a33268MsoNormal">15” 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 – the list is endless.  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.  I am not there yet.  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’s at speeds between 50 to 80 mph.=
  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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=20
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