Not sure how to describe it but here it goes... If im going really slow, say backing out of the driveway something from the rear makes a loud clunk clunk clunk as im backing up, I noticed with the door open and looking back when it clunks the back tire jerks.. I havn't done to much checking yet but I was told u-joints maybe, but I checked the drive shaft and they seem ok, and then the other I noticed the tire jerking.. any ideas??? Thanks everyone.. 88T/A built 700r4 10bolt posi 3.23..

 

so nobody has any ideas?