[mickmate]

Hey Bruce your diff runs a BPL (British Posi Lock) Jag doesn't it? The (Belleville washer) clutch lets the halfshafts rotate to where they need to independently of each other. That was Richards point. They do need to have the u-joints phased on each half shafts to cancel out the velocity changes of spinning in an elliptical path. Look at your half shafts, I think you may have found your problem. The yokes on each half shaft should be positioned so that their center lines are on the same axis. You can't change the phase relationship from one side to the other, each axle is done separately.