evilunclegrimace
Does not always play well with others
Incorrect info the T cases take dexron III. Auto track is for a different model/year of truck .Not for GMT 400 models.Front and rear diffs are GL5 rated 80W-90 with no friction modifiers. Transfer case is Dexron 6 if you don't have the "Auto" button for the 4WD, GM AutoTrak 2 if you do.