Band Apply Servo: Service and Repair

2-4 Servo

Tools Required

J 29714-A Servo Cover Depressor

Removal Procedure

1. Raise and support the vehicle. refer to vehicle lifting.
2. Remove the front propeller shaft (4WD only).
3. Clean away all dirt and debris from the 2-4 servo cover area.
4. Remove a single transmission oil pan bolt.




5. Install the J 29714-A in place of the transmission oil pan bolt.
6. Tighten the bolt in order to compress the servo cover.




7. Remove the servo cover retaining ring.
8. Remove the J 29714-A.




9. Remove the servo cover and the 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.




10. Remove the 2-4 servo from the transmission.
11. Inspect the 4th apply piston, 2-4 servo converter, 2nd apply piston, and the servo piston inner housing for the following defects.
^ Cracks
^ Scoring
^ Burrs and nicks
12. Disassemble the 2-4 servo if necessary.
13. Clean and inspect the 2-4 servo.

Installation Procedure

1. Assemble the 2-4 servo if previously disassembled. Refer to 2-4 Servo Assembly Installation.
2. Lightly lubricate the seals with clean transmission fluid.
3. Install new seals on the servo pistons and the servo cover.




4. Install the 2-4 servo assembly into the transmission.
5. Install the J 29714-A to the transmission oil pan flange.




6. Tighten the bolt in order to compress the servo cover.
7. Install the servo cover retaining ring.
8. Remove the J 29714-A.

Notice: Refer to Fastener Notice.

9. Install the oil pan bolt.

Tighten the oil pan bolt to 11 N.m (97 lb in).

10. Install the front propeller shaft (4WD only).
11. Lower the vehicle.
12. Fill the transmission to the proper level with DEXRON(R) VI transmission fluid. Refer to Transmission Fluid Checking. Transmission Fluid Check

Important: 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.