Looking to change my transfer case and rear diff oils soon. Been searching on the forums and there's a lot of back and forth between whether you must use Diaqueen LSD oil because of its speculative "special additives" or not. Instead starting yet another thread on this debate, I figure I'd just start a poll to see what people are using. Please tell me your expierence, good or bad.

 

I use Royal Purple very happy with the result the gear shift are much smoother.

 

i got some Redline 75/90 gear oil.... i think that is the weight. but have not done it yet. but all others suggest regardless what your using in the diff and transfer, to use the oem ATF fluid in the other part of the rear diff (it take 2 different fluids).

 

I use Amsoil in everything...Engine oil, transmission fluid, gear oil..

Severe Gear 75w-90 in the transfer case and rear diff gear oil, and Amsoil ATF in the rear diff AYC clutches. 20,000 miles on those fluids now with zero problems.

 

I use Amsoil gl-4, amsoil atf, and diaqueen in the tcase and the other diff in the rear.. or whatever its called. lol

 

I think you mean in the transmission

 

Keep the votes comin! Gurus please chime in.

 

First choice MTG from amsoil second choice Redline nothing else

 

I use royal purple, I am planning to change for AMSOIL

 

Amsoil

 

Ok, I see that some use OE and a many Amsoil or Redline.

For those using Redline, they list 75w90 GL5 for the transfer case and rear diff. What would be the right oil for the AYC?
I see Amsoil guys use ATF, so is it safe to say Redline ATF as well?

Any guys tracking their car with recommendations?