7 Series E38 L7 (M73) SAL
33 90 ...
Troubleshooting the rear axle and shock absorber
Troubleshooting on the rear axle
Condition
Cause
Remedy
Load reversals
a)
Excessive backlash
b)
Output shaft(s) faulty
c)
Propeller shaft
a)
Adjust torsional face runout
b)
Replace output shaft(s)
c)
Refer to troubleshooting
propeller shaft
Traction and coasting noise
Excessive or insufficient backlash
Adjust torsional face runout
Drumming
a)
Propeller shaft
b)
Rubber mount of rear axle
carrier faulty
c)
Rubber mount on final drive
suspension defective
d)
Rubber mount of control arm
faulty
e)
Rubber mount on traction strut
defective
f)
Output shaft(s) faulty
a)
Refer to troubleshooting
propeller shaft
b)
Replace rubber mounts
c)
Replace rubber mounts
d)
Replacing control arm, refer to
33 32 071
e)
Replacing traction strut, refer to
33 32 091
f)
Replacing output shaft(s), refer
to 33 21 000
Oil loss
a)
Radial shaft seal(s) leaking
b)
Vent clogged
c)
Wrong oil grade
a)
Replacing radial shaft seal(s),
refer to 33 11 021/
33 11 151
b)
Clean vent
c)
Replace final drive oil
Vibration
a)
Wheels imbalanced
b)
Rims have lateral/radial runout
c)
Tires have radial runout
d)
Output shaft faulty
e)
Propeller shaft
a)
Balance wheels
b)
Replace rims if necessary
c)
Match or replace tyres
d)
Replacing output shaft, refer to
33 21 000
e)
Refer to troubleshooting
propeller shaft
Condition
Cause
Remedy
Rattling noise
a)
Shock absorbers loose
RA Troubleshooting the rear axle and shock absorber
BMW AG - TIS
22.02.2013 02:40
Issue status (12/2007) Valid only until next DVD is issued
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