Hello, do they put all synthetic oils in the diffs, transfer case and transmission from the factory on the 03 and 04's. Mike

 

Both diffs come from the factory with synthetic 75W-90 GL-5, the slushbox and transfer case both have ATF+4, and I have no idea if it is synthetic or not, for the price the dealer charges it had better be synthetic.

 

I rember seeing a post here that Chevron make ATF+4 and it is synthetic. I have not seen any other place to get it other than the dealer. They sure do not make you a "Deal" when selling it.

 

AMSOIL also makes an ATF+4 tranny lube.