What Is Rear Diff Oil Burning Up So Fast 1999 2007 Gmc Sierra
Chosen Solution My rear diff oil is black and smells almost immediately after changing it to fresh recommended oil. The previous owner I believe never changed it but I have had it changed twice in the past two days. both times it was black with only a 30 minute ride. Also after driving on a dip the howling sound started and has not stopped even after the diff oil changes and a center barring mount change....