Band Apply Servo: Service and Repair

2-4 Servo

Special Tools

J 29714-A - Servo Cover Depressor

Removal Procedure

1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle Service and Repair.

2. Remove the 2 heat shield retaining bolts and the heat shield from the transmission.

3. Remove the oil pan bolt below and to the left of the 2-4 servo cover.

4. Install the J 29714-A - servo cover depressor to the oil pan rail.





5. Tighten the bolt on the J 29714-A - servo cover depressor in order to compress the servo cover.





6. Remove the servo cover retaining ring.

7. Loosen the bolt on the J 29714-A - servo cover depressor to release tension on the servo cover.





8. Remove the servo cover and O-ring seal. If the cover is hung up on the seal, use a pick (2) to pull and stretch the seal (1) out of the groove. Cut and remove the O-ring seal before removing the cover.





9. Remove the 2-4 servo assembly from the transmission.

10. Inspect the 4th apply piston, the 2-4 servo converter, 2nd apply piston, and the piston inner housing for the following defects:

* Cracks

* Scoring

* Burrs and nicks

Installation Procedure





1. Install the new seals on the pistons and the servo cover.

2. Lubricate the seals with clean transmission fluid.

3. Install the 2-4 servo assembly into the 2-4 servo bore.

4. Install the servo cover and O-ring seal.

5. Install the J 29714-A - servo cover depressor.





6. Tighten the bolt on the J 29714-A - servo cover depressor in order to compress the servo cover.

7. Install the servo cover retaining ring.

8. Remove the J 29714-A - servo cover depressor from the oil pan flange.

Caution:
Refer to Fastener Caution Fastener Caution.

9. Install the oil pan bolt and tighten to 11 Nm (97 lb in).

10. Install the 2 heat shield retaining bolts and the heat shield from the transmission then tighten to 17 Nm (13 lb ft).

11. Lower the vehicle.

12. Fill the transmission to the proper level with approved fluid.

Note:
It is recommended that transmission adaptive pressure (TAP) information be reset.

Resetting the TAP values using a scan tool will erase all learned values in all cells. As a result, The ECM, PCM or TCM will need to relearn TAP values. Transmission performance may be affected as new TAP values are learned.

13. Reset the TAP values. Refer to Transmission Adaptive Functions Transmission Adaptive Functions.