LI27.50-P-049281

Harsh engagement when changing gear range from P to D
Topic number
LI27.50-P-049281
Version
8
Function group
27.50 Gear assembly
Date
09-22-2020
Validity
Vehicles with transmission 722.9
Reason for change
722.993 added
Reason for block
Complaint:
When changing gear range from P to D, harsh engagement may be noticeable
Cause:
Friction coefficient fluctuations possible in B2 disk packs.
Remedy:
The engagement sequences for N-D and N-R must be taught in again as follows:
Note: Always remain in the gear ranges N/R/D for at least 5 sec!
Start the engine from cold,
shift 5 times N-R,
shift 5 times N-D --> warm up transmission to 40°C and while doing so, exceed a speed of 30 mph at least once.
shift 5 times N-R,
shift 5 times N-D --> warm up transmission to 70°C and while doing so, exceed a speed of 30 mph at least once.
shift 5 times N-R,
shift 5 times N-D.
Symptoms
Power transmission / Function / Jolting/shuddering during start-off
Power transmission / Automatic transmission / Function / Malfunction
Power transmission / Automatic transmission / Function / Shuddering during start-off
Power transmission / Automatic transmission / Function / Shudders
Power transmission / Automatic transmission / Function / Poor shift quality
09-22-2020 4:31 PM
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