Subject: Re: [TR] early TR4

From: Allen Hess <[email-masked]>
Date: Tue, 13 Jul 2021 14:29:07 -0400

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That=E2=80=99s correct. An early TR4 would have a solid spacer. Collapsible s=
pacer maybe arrived with IRS.=20

> On Jul 13, 2021, at 1:37 PM, Michael Marr <[email-masked]> wrot=
e:
>=20
> =EF=BB=BF I admit, it=E2=80=99s been a long time since I changed a pinion s=
eal on my 3A, but I=E2=80=99m pretty sure the the pinion position relative t=
o the crown wheel, and it=E2=80=99s preload, are determined by shims behind t=
he pinion head bearing, and another set of shims between the tail bearing an=
d the bearing spacer. Thus, as long as the tail bearing is not disturbed, yo=
u would not need to mark the position of the castle but, but simply retorque=
 it to the required 85-100 ft lbs. I must add that I am referring to the 3A=E2=
=80=99s diff here, but I=E2=80=99m pretty sure the solid axle 4 has the same=
 arrangement.=20
>=20
> Mike
>=20
> Sent from my iPhone
>=20
>>> On Jul 13, 2021, at 11:55, Cliff Hansen <[email-masked]> wrote=
:
>>>=20
>> =EF=BB=BF
>> Dave,
>> =20
>> The only other place I can think of to leak is the pinion seal at the fro=
nt. There=E2=80=99s a chance that the old seal has worn a groove in the pini=
on flange, which can be remedied by a Speedi-sleeve.
>> =20
>> When I removed the seal from my 4A IRS=E2=80=99s diff, the seal material w=
as leather and it was leaking terribly.
>> =20
>> If you are going to change the seal yourself, I would mark the position o=
f the castle nut relative to the pinion input shaft, and reinstall to the sa=
me position. The nut sets the preload for the pinion bearings, and assuming y=
our car uses the solid spacer removing and replacing that nut to the same po=
sition shouldn=E2=80=99t change the preload.  That=E2=80=99s the best I unde=
rstand it.
>> =20
>> Cliff
>> =20
>> =20
>> Sent from Mail for Windows 10
>> =20
>> From: dave
>> Sent: Tuesday, July 13, 2021 10:12 AM
>> To: [email-masked]
>> Subject: [TR] early TR4
>> =20
>> Approx. 9600 serial number; its essentially a TR3.
>> =20
>> The rear end leaks profusely.  I understand there is/are seal(s) that nee=
d to be replaced; its not the diff cover gasket.  BTDT
>> =20
>> Is there a link somewhere to the process and parts needed?
>> =20
>> Recommendations on upgrade(s)?=20
>> =20
>> Thanks!
>> =20
>> ** [email-masked] **
>>=20
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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto"><div dir=3D"ltr">That=E2=80=99s correct. An=
 early TR4 would have a solid spacer. Collapsible spacer maybe arrived with I=
RS.&nbsp;</div><div dir=3D"ltr"><br><blockquote type=3D"cite">On Jul 13, 202=
1, at 1:37 PM, Michael Marr &lt;[email-masked]&gt; wrote:<br><br>=
</blockquote></div><blockquote type=3D"cite"><div dir=3D"ltr">=EF=BB=BF

<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dutf-8">

I admit, it=E2=80=99s been a long time since I changed a pinion seal on my 3=
A, but I=E2=80=99m pretty sure the the pinion position relative to the crown=
 wheel, and it=E2=80=99s preload, are determined by shims behind the pinion h=
ead bearing, and another set of shims between the tail
 bearing and the bearing spacer. Thus, as long as the tail bearing is not di=
sturbed, you would not need to mark the position of the castle but, but simp=
ly retorque it to the required 85-100 ft lbs. I must add that I am referring=
 to the 3A=E2=80=99s diff here, but I=E2=80=99m
 pretty sure the solid axle 4 has the same arrangement.&nbsp;
<div><br>
</div>
<div>Mike<br>
<br>
<div dir=3D"ltr">Sent from my iPhone</div>
<div dir=3D"ltr"><br>
<blockquote type=3D"cite">On Jul 13, 2021, at 11:55, Cliff Hansen &lt;cliff_=
[email-masked]&gt; wrote:<br>
<br>
</blockquote>
</div>
<blockquote type=3D"cite">
<div dir=3D"ltr">=EF=BB=BF
<meta name=3D"Generator" content=3D"Microsoft Word 15 (filtered medium)">
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<p class=3D"MsoNormal">Dave,</p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">The only other place I can think of to leak is the pi=
nion seal at the front. There=E2=80=99s a chance that the old seal has worn a=
 groove in the pinion flange, which can be remedied by a Speedi-sleeve.</p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">When I removed the seal from my 4A IRS=E2=80=99s diff=
, the seal material was leather and it was leaking terribly.</p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">If you are going to change the seal yourself, I would=
 mark the position of the castle nut relative to the pinion input shaft, and=
 reinstall to the same position. The nut sets the preload for the pinion bea=
rings, and assuming your car uses
 the solid spacer removing and replacing that nut to the same position shoul=
dn=E2=80=99t change the preload.&nbsp; That=E2=80=99s the best I understand i=
t.</p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Cliff</p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Sent from <a href=3D"https://urldefense.proofpoint.co=
m/v2/url?u=3Dhttps-3A__go.microsoft.com_fwlink_-3FLinkId-3D550986&amp;d=3DDw=
MF-g&amp;c=3DeuGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&amp;r=3DHL4LAX-jeuo=
WNeqz1u1ryqDHfrhQ38xO3ECYGpjCniQ&amp;m=3DpitbkZGGPWs41g-1UxZ7JECIi2Ly2CyOgX-=
mibX8c-k&amp;s=3D3rtBCASeGfg8oAogfHtdF3ciJv1rkouT3v1hoQJlnq0&amp;e=3D">
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E1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class=3D"MsoNormal" style=3D"border:none;padding:0in"><b>From: </b><a hre=
f=3D"mailto:[email-masked]">dave</a><br>
<b>Sent: </b>Tuesday, July 13, 2021 10:12 AM<br>
<b>To: </b><a href=3D"mailto:[email-masked]">[email-masked]=
t</a><br>
<b>Subject: </b>[TR] early TR4</p>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Approx. 9600 serial number; its essentially a TR3.<o:=
p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">The rear end leaks profusely.&nbsp; I understand ther=
e is/are seal(s) that need to be replaced; its not the diff cover gasket.&nb=
sp; BTDT<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Is there a link somewhere to the process and parts ne=
eded?<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Recommendations on upgrade(s)?&nbsp; <o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Thanks!<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
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