Subject: Re: [Fot] Diff setup

From: Phil Gott via Fot <[email-masked]>
Date: Sun, 4 Nov 2018 14:37:14 -0500

Greg;
This could work if you get the preload correct. I would think it would be hard to install the carrier into the housing without damaging the shims. Damaged shins might feel good and give you correct pattern, but could creep out of place over a few miles.
Yes, removing the bearings (‘cones”) each time is a pain and risks ruining them each time. Someone on FOT suggested grinding out the ID of the cones of a couple of old bearings so they can be removed easily. That would get you close to the right set up without screwing up the new bearings. With s little luck your last installation with the new bearing cones would be right-on ( correct backlash, preload and pattern).
Good luck! I’ve done this so many times with mixed results that I now send my diffs out to Quantum Mechanics to do it for me.
Phil Gott
#114 ‘65 TR4A 

Sent from my iPhone

> On Nov 4, 2018, at 12:31 PM, Greg Blake via Fot <[email-masked]> wrote:
> 
> All,
> 
> Finally getting around to the new diff setup and it occurred to me to determine the carrier bearing preload and shim requirements, it is a lot easier to use the larger pinion bearing shims behind the bearing races than pulling the cone off the carrier several times.  See photo below. 
> 
> Any options to using this shim setup as a final installation?  Maybe a tab welded to the inside of the diff cover to ensure they don’t back out?  Thoughts?
> 
> 
> 
> Sent from my iPhone
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From: John Styduhar via Fot <[email-masked]>
Date: Sun, 4 Nov 2018 15:57:21 -0500

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This idea was mentioned somewhere in the past FOT discussions.  It's the
same approach as the 8.8 Ford setup, but I don't see how you can keep thin
shims from damage.  The Ford uses one single shim of the appropriate
thickness.  These's also the problem with shim walkout.  Pulling the
carrier bearings is the least of my troubles when setting backlash and
preload.

On Sun, Nov 4, 2018 at 1:07 PM Greg Blake via Fot <[email-masked]>
wrote:

> All,
>
> Finally getting around to the new diff setup and it occurred to me to
> determine the carrier bearing preload and shim requirements, it is a lot
> easier to use the larger pinion bearing shims behind the bearing races th=
an
> pulling the cone off the carrier several times.  See photo below.
>
> Any options to using this shim setup as a final installation?  Maybe a ta=
b
> welded to the inside of the diff cover to ensure they don=E2=80=99t back =
out?
> Thoughts?
>
>
>
> Sent from my iPhone_______________________________________________
> [email-masked]
>
> Unsubscribe/Manage:
> http://autox.team.net/mailman/options/fot/[email-masked]
>
>
>

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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-size:small">Thi=
s idea was mentioned somewhere in the past FOT discussions.=C2=A0 It&#39;s =
the same approach as the 8.8 Ford setup, but I don&#39;t see how you can ke=
ep thin shims from damage.=C2=A0 The Ford uses one single shim of the appro=
priate thickness.=C2=A0 These&#39;s also the problem with shim walkout.=C2=
=A0 Pulling the carrier bearings is the least of my troubles when setting b=
acklash and preload.</div><div class=3D"gmail_default" style=3D"font-size:s=
mall"><br></div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr">On Su=
n, Nov 4, 2018 at 1:07 PM Greg Blake via Fot &lt;<a href=3D"mailto:fot@auto=
x.team.net">[email-masked]</a>&gt; wrote:<br></div><blockquote class=3D=
"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding=
-left:1ex">All,<br>
<br>
Finally getting around to the new diff setup and it occurred to me to deter=
mine the carrier bearing preload and shim requirements, it is a lot easier =
to use the larger pinion bearing shims behind the bearing races than pullin=
g the cone off the carrier several times.=C2=A0 See photo below. <br>
<br>
Any options to using this shim setup as a final installation?=C2=A0 Maybe a=
 tab welded to the inside of the diff cover to ensure they don=E2=80=99t ba=
ck out?=C2=A0 Thoughts?<br>
<br>
<br>
<br>
Sent from my iPhone_______________________________________________<br>
<a href=3D"mailto:[email-masked]" target=3D"_blank">[email-masked]<=
/a><br>
<br>
<a href=3D"http://www.fot-racing.com" rel=3D"noreferrer" target=3D"_blank">=
http://www.fot-racing.com</a><br>
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et=3D"_blank">http://www.team.net/donate.html</a><br>
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et/mailman/options/fot/[email-masked]</a><br>
<br>
<br>
</blockquote></div>

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From: Chris Marx via Fot <[email-masked]>
Date: Mon, 5 Nov 2018 08:39:19 +0100

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I have made myself a set of dummy bearings to set up the diff.

The slide on without any tools.

When the adjustment is done, I replace the dummies with the new bearing =
set and work is done.

=20

Cheers

Chris

=20

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</o:shapelayout></xml><![endif]--></head><body lang=3DDE link=3Dblue =
vlink=3Dpurple><div class=3DWordSection1><div><blockquote =
style=3D'border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm =
6.0pt;margin-left:4.8pt;margin-right:0cm'><p class=3DMsoNormal><span =
lang=3DEN-US>I have made myself a set of dummy bearings to set up the =
diff.<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US>The =
slide on without any tools.<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>When the adjustment is done, I =
replace the dummies with the new bearing set and work is =
done.<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>Cheers<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>Chris<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p></blockquote></div></div></body>=
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From: Chris Marx via Fot <[email-masked]>
Date: Mon, 5 Nov 2018 21:54:27 +0100

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Hi John,

=20

I did measure on many bearings and they are made so exact, that I =
=E2=80=98ve never found any differences.

The manufacturing quality of Timken, SKF and others are excellent.

=20

Cheers

Chris

=20

Von: John Styduhar <[email-masked]>=20
Gesendet: Montag, 5. November 2018 21:44
An: MadMarx <[email-masked]>
Betreff: Re: [Fot] Diff setup

=20

Chris, do you measure the height of the old and new bearing and race?

=20

On Mon, Nov 5, 2018 at 2:47 AM Chris Marx via Fot <[email-masked] =

=20

Cheers

Chris

=20

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vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'mso-fareast-language:EN-US'>Hi John,<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'mso-fareast-language:EN-US'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'mso-fareast-language:EN-US'>I did measure on many bearings and =
they are made so exact, that I =E2=80=98ve never found any =
differences.<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US style=3D'mso-fareast-language:EN-US'>The manufacturing =
quality of Timken, SKF and others are excellent.<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'mso-fareast-language:EN-US'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'mso-fareast-language:EN-US'>Cheers<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'mso-fareast-language:EN-US'>Chris<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'mso-fareast-language:EN-US'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><b>Von:</b> John Styduhar &lt;[email-masked]&gt; =
<br><b>Gesendet:</b> Montag, 5. November 2018 21:44<br><b>An:</b> =
MadMarx &lt;[email-masked]&gt;<br><b>Betreff:</b> Re: [Fot] =
Diff setup<o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><div><p =
class=3DMsoNormal><span style=3D'font-size:12.0pt'>Chris, do you measure =
the height of the old and new bearing and =
race?<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><div><p class=3DMsoNormal>On =
Mon, Nov 5, 2018 at 2:47 AM Chris Marx via Fot &lt;<a =
href=3D"mailto:[email-masked]">[email-masked]</a>&gt; =
wrote:<o:p></o:p></p></div><blockquote =
style=3D'border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm =
6.0pt;margin-left:4.8pt;margin-right:0cm'><div><div><div><blockquote =
style=3D'border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm =
6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5=
.0pt'><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-US>I have made myself a set of dummy bearings to set up the =
diff.</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-US>The slide on without any tools.</span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-US>When the adjustment is done, I replace the dummies with the =
new bearing set and work is done.</span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-US>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-US>Cheers</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-US>Chris</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-US>&nbsp;</span><o:p></o:p></p></blockquote></div></div></div><=
p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'>__________________________________________=
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