I seem to have a reaccuring problem with my rear ball joints.. Bout every other month the bolts holding the joint to the a frame start letting the joint shift forward and backward this of course loosens the bolts. The last time I used two nuts on the forward bolts and locked them together...It is beginning to shift again these are moog joints..Has anyone else had this problem for the only way I see to fix it is to weld the joint to the a frame...suggestions??

What type of nuts are you using? If the nuts keep comming loose I would put on new nylon lock nuts.

These are grade 8 with lock washers.. The first time they came loose I replaced both and this time I use two nuts on the bolts and the joint stayed ok for bout a month and coming home yesterday it started moving again...You can jack a corner up and the wheel will move in and out from the side not up and down...I admit I like to hang it out in a turn but with a duke it is not going to loosen from power...

LockTite is your friend.