[Fot] Diff lube

[Brad Eells]

Running Redline MT-90 GL-4 in the Spitfire with a Detroit Locker.

Is that good?

The 43 year old stuff I poured out of it had the consistency of honey...

Brad Eells
Sent from my iPhone

> On Aug 14, 2019, at 12:09 PM, Robert Lang via Fot <fot at autox.team.net> wrote:
> 
> Hi - if you are running a Quaife, the Redline should be okay. The only reason it would not be okay would be if you were still running the stock differential center section which has brass / bronze (aka "yellow metal") parts. The shockproof stuff is API GL5 and that will eat the yellow metal. But the Quaife internals are all steel, so GL5 should not be a problem.
> 
> As a point of reference and pertaining to the question, I've been mostly using Mobil 1 75w140. I would also recommend using the higher numbered oil 75w-140 vs 75w-90 because the differential runs very hot and I think the 75w-90 would be working out of temp range.
> 
> Regards,
> Bob Lang
> 
> On Wednesday, August 14, 2019, 2:45:05 PM EDT, kkjjk--- via Fot <fot at autox.team.net> wrote:
> 
> 
> To all FOT guys (and gals)-  Can you tell me what type of rear diff lube you are using with a Quaife LSD set up?-  Otherwise stock GT6 rear.  I was using Redline Light Weight Shockproof oil but I have heard that's not good.   Thanks!- Jay De Pol
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