A/T - Jolt At Cruise With Converter Clutch Applied

Date: August 30, 2006

Order No.: P-B-27.20/78

Supersedes:

Group: 27

SUBJECT:
Model 211.026/065/070/076/082/083/265/276/282/283

Equipped with 722.6 Transmission

Vehicle Jolt at Constant Speeds or During Gentle Acceleration When Torque Converter Clutch is Applied

If you receive customer reports in the above model vehicles of a vehicle jolt at constant speeds or during gentle acceleration when the torque converter clutch is applied, and vehicle mileage is > 40,000, perform the following diagnosis / remedy.

Diagnosis

1. Verify that the concern is no longer reproducible with the torque converter clutch deactivated, using SDS path: Control units -> Drive -> Transmission -> Diagnostic routines -> Switch off torque converter clutch.

2. Verify there is no glycol present in the transmission oil by following the glycol test procedure in DTB P-B-27.55/50f dated March 24, 2006.

After the above criteria have been confirmed, follow the steps below to flush the transmission oil and restore proper function to the torque converter clutch.

Remedy

1. Run the vehicle until the transmission oil temperature is up to 80°C (176°F) and have 14 liters of fresh transmission oil available (A001 989 21 03 10 or A001 989 45 03 10).

2. Drain the oil from the transmission and install a new transmission oil filter and pan gasket. Refer to WIS document AP27.00-P-2702i.

3. Fill transmission with 5 liters of fresh oil.

4. Detach the right side (passenger side) transmission cooler line from the transmission including the mounting bracket on engine.

5. Direct the flow of the cooler line into a bucket which has a 10 liter capacity and a measurement scale.

6. Start the engine and allow 3 liters of transmission oil to flow into the bucket from the cooler line.

7. Switch off the engine and replenish another 3 liters of fresh oil into the transmission.

8. Repeat steps 6 and 7.

9. Reconnect the cooler line to the transmission (replace the sealing ring) and reattach the mounting bracket as well.

10. Make a final oil level correction, clean any residual oil from the flushing process and check for leaks.

Note:
Improvements will become noticeable after about 60-120 miles of driving.





Parts Information