[Fot] Final drive (differential) oil

[Mike Harmuth]

Hi Phil, this is what John at Quantium sent me about trans and diff oils. I
couldn't find the Sta-lube in the US but had no problem getting a couple of
quarts of it via Flea Bay from Canada.

For the diffs we found the CRC Sta-lube brand 85W90 is a high quality GL4
spec oil or you can use the Redline 75W90 synthetic (even though it says
GL5).
For the transmissions you might want to switch to the Redline MTL or MT90
spec synthetic oils.

mike h

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On Tue, Aug 9, 2022 at 10:07 PM Philip Gott via Fot <fot at autox.team.net>
wrote:

> Amici:
> 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.
> What do you all run for oil (brand and viscosity) and what is your
> experience?
> Thanks and regards,
> Phil
>
> Sent from my iPhone
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