i dont think its a u-joint cause the car doesnt have to move to get the noise. its just like a bent dust cover kind of rattle. he says that the plate overhangs the ring gear to just about a 1/16 before the v in the tooth. rite were the starter housing sits. i think the plate is rubbing against the starter housing. we'll know later tonite. he painted the housing before reinstalling the starter and we'll look for fresh marks or he will.