Quote Originally Posted by tanz45 View Post
I use Mobile 1 5w30 for motor, valvoline Synthetic in tranny, Mobile 1 90/140 in Diffs w/addative, regular atf in T-Case.

Some say not to use synthetic in the tranny because it will clean out all the junk. Just make sure you use a line/converter cleaner. Comes in a pressurized can that you hook up the cooling line and pump it through the system.
Thanks, I was going to hook up the trans to the BG machine at my friends shop and do a full tranny flush first. Then fill it up with synthetic, would this be acceptable? Do you know what the recommended change on the diff oil is? It is a 4wd Z71.