<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">Good point Glen. Welding up the center section makes the soft yellow metal cone washers moot. <div><br></div><div>I’ve found EP90 GL4 from Car Quest (available from Advance) as a good substitute for StaLube GL4, but it overheats and failed us in endurance racing. It has always worked in the shorter vintage race, and is cheap enough the drain and refill often. <br><div><br><div dir="ltr">Sent from my iPhone</div><div dir="ltr"><br><blockquote type="cite">On Aug 10, 2022, at 10:03 AM, fubog1 via Fot <fot@autox.team.net> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr">
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<div> <font size="2">Welded rear gears aren't that fussy about lube, any good hypoid gear oil should be OK;</font></div>
<div><font size="2">I usually use 80-90 Valvo in them.<br>
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<div><font size="2">The metal in the sample is a different story, they normally don't "make" any metal in operation.</font></div>
<div><font size="2">You'll have to remove the cover & get a visual on things, check the lash, mesh pattern & preloads best possible in situ.</font></div>
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<div><font size="2">Glen Efinger</font><br>
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<div style="font-family:arial,helvetica;font-size:10pt;color:black"><font size="2">-----Original Message-----<br>
From: Philip Gott via Fot <fot@autox.team.net><br>
To: Friends Of Triumph <fot@autox.team.net><br>
Sent: Tue, Aug 9, 2022 9:53 pm<br>
Subject: [Fot] Final drive (differential) oil<br>
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<div dir="ltr">Amici:<br>
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<div dir="ltr">At the risk of opening Pandora’s box, May I ask what 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 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 gear set. I have yet to pull the cover. Backlash seems “normal.” The rear end was set up by Quantum Mechanics whom I trust.<br>
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<div dir="ltr">What do you all run for oil (brand and viscosity) and what is your experience?<br>
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<div dir="ltr">Thanks and regards,<br>
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<div dir="ltr">Phil<br>
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<div dir="ltr">Sent from my iPhone<br>
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