by Petz » 01 Jul 2015, 12:25
agreed. But if it's in High Lock (HL) the fronts would be doing it as well. There is always a chance the diff is damaged.
Put in jack stands all around and spin one tire. If all of them move then that's your issue. HMMWVs don't have locking diffs, the operator manual has a technique where you lightly apply the breaks to "Lock" them up. I could go into the how-to on the way an open diff works but it's boring and pointless in this thread. PM me if you're interested to know.