Re: [Fot] Final drive (differential) oil

[fubog1 via Fot <fot@autox.team.net>]

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 Welded rear gears aren't that fussy about lube, any good hypoid gear oil s=
hould be OK;I usually use 80-90 Valvo in them.
The metal in the sample is a different story, they normally don't "make" an=
y metal in operation.You'll have to remove the cover & get a visual on thin=
gs, check the lash, mesh pattern & preloads best possible in situ.
Glen Efinger
=20
=20
-----Original Message-----
From: Philip Gott via Fot <fot@autox.team.net>
To: Friends Of Triumph <fot@autox.team.net>
Sent: Tue, Aug 9, 2022 9:53 pm
Subject: [Fot] Final drive (differential) oil

Amici:
At the risk of opening Pandora=E2=80=99s box, May I ask what gear oil you w=
ould recommend for the rear end in my TR4A (solid axle)? I am running Mobil=
 1 75-140 and found some metal flakes on my magnetic filler plug after Pitt=
 Race. Usually there are some whiskers, but the metal flakes are concerning=
. The rear end is a welded diff carrying a relatively new (3 seasons) 4.1 g=
ear set.=C2=A0 I have yet to pull the cover. Backlash seems =E2=80=9Cnormal=
.=E2=80=9D The rear end was set up by Quantum Mechanics whom I trust.
What do you all run for oil (brand and viscosity) and what is your experien=
ce?
Thanks and regards,
Phil

Sent from my iPhone
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<div style=3D"color:black;font: 10pt Arial, Helvetica, sans-serif;">
<div> <font size=3D"2">Welded rear gears aren't that fussy about lube, any =
good hypoid gear oil should be OK;</font></div>

<div><font size=3D"2">I usually use 80-90 Valvo in them.<br>
</font></div>

<div><font size=3D"2">The metal in the sample is a different story, they no=
rmally don't "make" any metal in operation.</font></div>

<div><font size=3D"2">You'll have to remove the cover &amp; get a visual on=
 things, check the lash, mesh pattern &amp; preloads best possible in situ.=
</font></div>

<div><br>
</div>

<div><font size=3D"2">Glen Efinger</font><br>
</div>

<div> <br>
</div>

<div> <br>
</div>

<div style=3D"font-family:arial,helvetica;font-size:10pt;color:black"><font=
 size=3D"2">-----Original Message-----<br>
From: Philip Gott via Fot &lt;fot@autox.team.net&gt;<br>
To: Friends Of Triumph &lt;fot@autox.team.net&gt;<br>
Sent: Tue, Aug 9, 2022 9:53 pm<br>
Subject: [Fot] Final drive (differential) oil<br>
<br>

<div dir=3D"ltr">Amici:<br>
</div>

<div dir=3D"ltr">At the risk of opening Pandora=E2=80=99s box, May I ask wh=
at gear oil you would recommend for the rear end in my TR4A (solid axle)? I=
 am running Mobil 1 75-140 and found some metal flakes on my magnetic fille=
r plug after Pitt Race. Usually there are some whiskers, but the metal flak=
es are concerning. The rear end is a welded diff carrying a relatively new =
(3 seasons) 4.1 gear set.&nbsp; I have yet to pull the cover. Backlash seem=
s =E2=80=9Cnormal.=E2=80=9D The rear end was set up by Quantum Mechanics wh=
om I trust.<br>
</div>

<div dir=3D"ltr">What do you all run for oil (brand and viscosity) and what=
 is your experience?<br>
</div>

<div dir=3D"ltr">Thanks and regards,<br>
</div>

<div dir=3D"ltr">Phil<br>
</div>

<div dir=3D"ltr"><br>
</div>

<div dir=3D"ltr">Sent from my iPhone<br>
</div>

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