I can't seem to get a u joint to fit my mj its an 88 4.0 4wd 5 speed. Is it a normal size u joint? autozone has given me two duds so far. A customer behind me, said they can be hard to find one to fit. Never had this problem with my other dana 30s did find two extra bolt hols under my diff cover that had no hole in the cover for them. But I'm pretty sure its stock axle.