LI33.30-N-071003

Howling noises in drive train in area of front axle differential
Topic number
LI33.30-N-071003
Version
1
Function group
33.30 Final drive, differential, drive shaft
Date
02-19-2020
Validity
Model 906, 907 with code ZG1 (all-wheel drive, engageable)
Model 906, 907 with code ZG3 (engageable all-wheel
drive with gear reduction ratio)
Reason for change
Distribution extended
Reason for block
Complaint:
Howling noises in drive train in area of front axle differential.
Information:
•
When accelerating,
•
in overrun mode or
•
when maintaining the same speed.
Cause:
This topic is under analysis
Remedy:
1.
If there is a corresponding customer complaint, please create a PTSS case with reference to this LI document
LI33.30-N-071003 and wait for instructions (take SI00.00-S-0086A into consideration).
Info: To investigate the fault profile more precisely, further information is required. Please attach the following information (pictures, video & sound recordings, etc.) to the PTSS case and answer the following questions in the
PTSS case.
-------------------------------------------------------------------------------------------------------------------------------Pictures:
•
Pictures of the serial number of the front axle differential and the transfer case.
•
Pictures of the vehicle inside, outside and underbody (incl. suspension)
•
Pictures of the tires installed on the vehicle.
Info: The tire size of the tires installed on the vehicle must be legible on the pictures.
-------------------------------------------------------------------------------------------------------------------------------Video or sound recordings (essential):
•
Video or sound recording of the complaint.
Info: The video or sound recording can be made with a smartphone.
Info: If possible, film the speedometer and the tachometer at the point when the problem occurs.
Info: Say "Now" when the problem starts and stops.
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Info: In a sound recording, say the speed of the vehicle. When accelerating or decelerating, say the speed in 10
km/h steps.
-------------------------------------------------------------------------------------------------------------------------------Questions:
•
•
•
•
•
•
When exactly does the problem occur?
At what speed does the problem occur?
In which load state does the problem occur?
In which loading conditions does the problem occur?
In which driving mode does the problem occur (all-wheel drive with/without reduction ratio, or rear wheel drive)?
What expansion measures have been undertaken on the vehicle?
Attachments
File
Description
SI00.30-S-0086A_Service Information_ Guidelines for
queries in the event of technical complaints.pdf
Service Information, Guidelines for queries in the event of
technical complaint
Front Axle Number Location.JPG
Example: Front Axle Number Location
Symptoms
Chassis/suspension / Noises / Humming/droning/throbbing
Power transmission / Noises / Howling/whistling
Power transmission / Differential / Front axle differential / Noises / Howling
Power transmission / Transfer case / Noises / Howling/whistling
Power transmission / Transfer case / Noises / Humming/droning
Power transmission / Power take-off/additional drive system / Noises / Howling
Chassis/suspension / Noises / Howling
Power transmission / Noises / Humming/droning
Operation numbers/damage codes
Op. no.
Operation text
Time
Damage
code
Note
33401 46
Front axle differential – howls
The listed damage code is not to
be considered as an acceptance of
costs. The general guidelines in the
Warranty Manual apply.
WIS-References
Document number
Title
Note
SI00.00-S-0086A
Service Information: Guidelines for queries relating to
technical complaints
Allocation
Remedy
Validity
Vehicle
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