GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2009 🢒 Express - AWD 🢒 Transmission 🢒 Automatic Transmission - 4L60-E/4L65-E/4L70-E 🢒 2-4 Servo

Special Tools

J 29714-A Servo Cover Depressor

Removal Procedure
  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle.
  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 to the oil pan rail.

    5. Object Number: 14478 Size: SH
  5. Tighten the bolt on the J 29714-A in order to compress the servo cover.

    6. Object Number: 642680 Size: SH
  6. Remove the servo cover retaining ring.
  7. Loosen the bolt on the J 29714-A to release tension on the servo cover.

    8. Object Number: 645364 Size: SH
  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. Object Number: 642523 Size: SH
  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:
    11. • Cracks
    • Scoring
    • Burrs and nicks

Installation Procedure

    Object Number: 642523 Size: SH
  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 .

    6. Object Number: 14478 Size: SH
  6. Tighten the bolt on the J 29714-A in order to compress the servo cover.
  7. Install the servo cover retaining ring.
  8. Remove the J 29714-A from the oil pan flange.

    9. Caution: Refer to Fastener Caution in the Preface section.

  9. Install the oil pan bolt and tighten to 11 N·m (97 lb in).
  10. Install the 2 heat shield retaining bolts and the heat shield from the transmission then tighten to 17 N·m (13 lb ft).
  11. Lower the vehicle.
  12. Fill the transmission to the proper level with approved fluid.

    13. 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.