Replaced center bearing this weekend...what a PITA! Broke an exhaust stud during reinstallation. Very frustrating, as vibration/rumble is now worse than before in first and second on acceleration. There was not a lot of slop in the front ujoint, but the joints had no resistance to movement at all...new guibo and center bearing did not help. And yes, I pre loaded the center bearing (twice). Any advise...I'm even thinking of taking it to the dealer? Pls help.