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Copyright Meritor, Inc., 2022
MM-0861 / Revised 06-22
Page 93
Printed in USA
10 Troubleshooting
Excessive Noise and Vibration Diagnostics
Determine all driveline angles.
Angles should not exceed 5º and the
difference between any of the angles
should not be greater than 1.5º.
Excessive driveline angles are
the leading cause of drivetrain
vibration and noise.
Consult the vehicle manufacturer.
Check transfer case
mounting fasteners for
correct torque. Refer to
vehicle manufacturer’s
specifications.
Check all drivelines for
adequate balancing.
Replace or
rebalance
driveline.
Check u-joints for
excessive wear and
damaged rollers.
Check for loose or broken
case-to-vehicle mounting
brackets and fasteners.
Return the
vehicle to service.
Road test the
vehicle to
determine if
noise/vibration
is still present.
Replace broken
brackets and/or
tighten all
fasteners to
specified torque.
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
Replace worn bearings
or damaged components.
Check all declutch and all
transfer case shafts for
excessive wear. Repair as
necessary.
Problem
corrected?
Loose
fasteners or
broken
bracket?
Are angles
excessive?
Wear or
damage?
Balanced?
4001527b
Figure 10.3