Driveshafts Troubleshooting - BMW 1999-2005 M3 Service Manual

Driveshafts
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Troubleshooting
The source of driveline vibrations and
noise can be difficult to pinpoint. Engine,
transmission, front and rear axle, or
wheel vibrations can be transmitted
through the driveshaft to the car body.
Noises from the car may be caused by
final drive problems, or by faulty wheel
bearings, drive axles, or even worn or
improperly inflated tires.
Note:
For drive axle repair information, see
311 Front Axle Final Drive
Rear Axle Final Drive.
Driveshaft noise or vibration may be
caused by worn or damaged
components. Check the universal joints
for play. With the driveshaft installed, pull
and twist the driveshaft while watching
the joint. The BMW specification for play
is very small, so almost any noticeable
play could indicate a problem.
Check the torque of the fasteners at the
flange connections. At the rear driveshaft
check the rubber of the flex-disc and
center bearing for deterioration or tearing
and check for preload at the center
bearing with a visual inspection. Check
the driveshafts for broken or missing
balance weights. The weights are welded
tighten to 100 Nm
(74 ft-lb)
- Rear driveshaft
assembly
- Driveshaft
center bearing
mount
or 331
2/25/2009 10:20 PM