I recently had the transmission rebuilt in my 1980 300CD. The transmission
shop called me right after they had the trans back into the car. At that time
they said that my driveshaft center support needed replacement. I thought they
replaced both the rubber support and the bearing. However, I looked under the
car and it appears that the rubber support has been replaced but the bearing is
original because it has a torn dust boot.
At low speed I'm getting a rumble or shutter which seems to be coming from
under the center of the car. It's worse on harder acceleration or going up
hills. Could it be a worn center support bearing? I don't know if the
transmission shop reassembled the two halfs of the driveshaft correctly? Are
the two halfs marked after being factory balanced? BTW both flex discs have
been replaced along with both rear axle half shafts (with new parts). The car
has 270,000+ miles on it (63,000 miles since I rebuilt the engine). Everything
but the center support dust boot looks fine under the car but I still have the
vibration. Any Mercedes mechanics out there with suggestions.