2008 X3 driveline vibration/manual tranny

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??

Help with X3 Driveline vibration

I still have this annoying vibration and my drive shaft has been replaced by the dealer. Has anyone out there experienced this type of vibration and do you have any ideas??? I love this vehicle even though its a truck. Drives wonderfully just that damn vibration under moderate acceleration.