DSG,A/T - Rough Gear Changes When Accelerating and Decelerating
37 Rough gear changes both when accelerating and slowing down37 12 40
2028715/1
February 28, 2012.
Affected Vehicles
Condition
Rough gear changes both when accelerating and slowing down.
At constant speed without gear change there is a sporadic rough/driving power disruption.
Technical Background
After a Mechatronics, torque converter, or complete gearbox change the clutches must be adapted to the new component; this requires a gradual move of the clutch linings towards the optimal operating points in the most diverse load conditions. Therefore, sporadic driving power disruptions or reduced shift comfort are possible over the first 500 miles despite adaptation. With time these issues decrease depending on the driving profile.
This happens also if the adaptation values of the gearbox were deleted.
Production Solution
Not applicable.
Service
The first step in any shift concern should be to check the fluid level and condition. Correct level if low and test drive to recheck for the concern. If burnt or contaminated fluid is found call TAC with fluid sample showing condition before any repairs. If level and condition is okay proceed as follows.
Sporadic driving power disruptions (jerks) or reduced shift comfort are possible over the first 500 miles as the clutch linings gradually move towards the optimal operating points in the most diverse load conditions. This is normal operation of the transmission.
After replacing a Mechatronics unit, torque convertor, or a complete gearbox the clutches must be adapted per the procedure from ELSA or GFF. This may also be required after certain software updates, or if the adaptations were cleared. This GFF or ELSA procedure is required to start the clutch adaptations properly toward full adaptation. Sporadic driving power disruptions (jerks) or reduced shift comfort are still possible over the first 500 miles despite adaptation as the clutch linings gradually move towards the optimal operating points in the most diverse load conditions.
Warranty
This TSB is informational only and not applicable to any Audi warranty.
Additional Information
All parts and service references provided in this TSB are subject to change and/or removal. Always check with your Parts Department and service manuals for the latest information.