[Fot] Reline Heavy Shockproof Gear OIl All Sythetic

[Bob Kramer]

Car Quest EP 90 GL-4 can be purchased at Advance Auto Parts.  I think it is
special order but some may even carry it on the shelf.

I like the GL4 in my Detroit Locker because I can drain and refill it
often. I can do that with synthetics too, at a much higher price. The same
reason I use Valvoline VR-1 non synthetic oil.

CARQUEST Grease and Lube EP 90 GL-4 Gear Oil, 1 Gallon
No Reviews
<https://shop.advanceautoparts.com/p/carquest-grease-and-lube-ep-90-gl-4-gear-oil-1-gallon-990-01/10899976-P#>
30 DAY REPLACEMENT IF DEFECTIVE
<https://shop.advanceautoparts.com/p/carquest-grease-and-lube-ep-90-gl-4-gear-oil-1-gallon-990-01/10899976-P#>
Part # 990-01

Bob Kramer


On Wed, Apr 15, 2020 at 1:22 PM Mike Harmuth via Fot <fot at autox.team.net>
wrote:

> Bud, I got this from my tranny and diff guy, John Esposito at Quantum
> Mechanics. Not a direct answer to your question but it does reference
> Redline diff oils
>
> "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
>
> On Wed, Apr 15, 2020 at 1:54 PM Bud Rolofson via Fot <fot at autox.team.net>
> wrote:
>
>> Listerati
>> Does anyone know if the Redline gear oil is going to eat the yellow metal
>> in my Spitfire differential? Is it GL4 or GL5. Only info I found said it
>> "exceeds GL5" without being any more specific. Does being All Synthetic
>> make a difference in its ability to eat TR diffs?
>> I drained a spare Spit diff of some nasty old oil plus a little bit of
>> water (do diffs  condensate water internally like gas tanks since they are
>> "open air vented) and I want to put gear oil so it's ready to race off the
>> shelf.
>> Full disclosure I raced last season with it in my welded Spit 4:11 diff
>> with no problems, no leaks, but who knows about the yellow parts.
>>
>> Living the dream of getting caught up on projects in the shop.
>> Thanks
>> Bud
>>
>> Sent from my Commodore 64
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