2005 jetta tdi BEW wagon. I just had the 230mm clutch, pressure plate, dual mass flywheel, and release (throwout) bearing with the bearing slide tube replaced with the Sachs kit. On the test drive the clutch seemed to engage and disengage smoothly. The noise when the transmission was out of gear and the motor was running with the clutch disengaged (the original problem) was gone. But, when driving the car there was a severe vibration at 1,800 to 2,300 rpm, worse under acceleration. It could be felt throughout the car even in the seat, but not through the shifter. The motor mount on the driver side was replaced with an ECS Tuning mount the week before. It feels like driveline vibration. Any ideas?