GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2006 🢒 GTO 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4L60-E/4L65-E/4L70-E 🢒 2-4 Servo

Tools Required

J 29714-A Servo Cover Depressor

Removal Procedure

    Object Number: 14478 Size: SH
  1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Install a transmission jack and remove the transmission mount. Refer to Transmission Mount Replacement .
  3. Lower the transmission.
  4. Remove the oil pan bolt below and to the left of the 2-4 servo cover.
  5. Install the J 29714-A to the oil pan rail.
  6. Tighten the bolt on the J 29714-A to compress the servo cover.

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

    9. Object Number: 645364 Size: SH
  9. 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.

    10. Object Number: 642523 Size: SH
  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:
    12. • Cracks
    • Scoring
    • Burrs and nicks

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

    2. Object Number: 642523 Size: SH
  2. Install the 2-4 servo to the transmission.
  3. Install the servo cover and O-ring seal.

    4. Object Number: 14478 Size: SH
  4. Tighten the bolt on the J 29714-A to compress the servo cover.
  5. Install the servo cover retaining ring.
  6. Loosen the bolt on the J 29714-A to release tension on the servo cover.
  7. Remove the J 29714-A from the oil pan rail.

    8. Notice: Refer to Fastener Notice in the Preface section.

  8. Install the oil pan bolt below the 2-4 servo cover.

    9. Tighten
    Tighten the oil pan bolt to 12 N·m (106 lb in).

  9. Raise the transmission.
  10. Install the transmission mount. Refer to Transmission Mount Replacement .
  11. Remove the transmission jack.
  12. Lower the vehicle.
  13. Fill the transmission to the proper level with DEXRON® VI transmission fluid. Refer to Transmission Fluid Check .

    14. 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.

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