I have already posted this in the X3 forum as well but am hoping that someone out there has some experience with this. See below. Has anyone experienced a vibration with a manual tranny X3 under moderate acceleration? My drive shaft has been replaced and I still get a vibration 80% of the time with moderate to full acceleration or on an uphill climb even at highway speeds. BMW master tech says there is no vibration even though they replaced the driveshaft to correct this "no vibration: It seems just like a u-joint startting to go in the early stages. Been to the dealer 3 times and counting. Any ideas??