what is everyone using in their rearends and transfercase......i have already used the mobile one for oil but what about the other two????

 

We use synthetic 75W-140 in all the diffs we build at work. Just regular ATF in the t-case. Transfer cases don't really do anything to demand a synthetic fluid, a waste in my opinion. I have only seen a few fail over my career with Chrysler.

 

good enuff dodgemech....i will put that in there then. I seen that at walmart ...the 75w140 but i didnt know if that was the right one but i will use that one and the atf in the transfer case also....the only question i had was the synthetic transmission fluid on what to use, so if you read this again let me know...thanx!!!!

 

I am not a big fan of sythetic trans fluid. It does have much better heat propeties which is important but it gives up quite a bit of friction modifier. Many top trans builders will not honor transmission warranties if synthetic is used. TCI and Hughes are just 2 of them.