GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2009 🢒 Allure 🢒 Transmission 🢒 Automatic Transmission - 4T65-E 🢒 Forward Servo Replacement

Removal Procedure
  1. Install the engine support fixture. Refer to Engine Support Fixture.
  2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  3. Remove and support the power steering gear. Refer to Steering Gear Replacement.
  4. Remove the transaxle mount lower nuts. Refer to Transmission Mount Replacement - Left Side.
  5. Remove the engine mount lower nuts. Refer to Engine Mount Replacement - Right Side.
  6. Remove the power steering lines from the right side of the frame.
  7. Support the rear of the frame with a jackstand.
  8. Loosen the front frame bolts and remove the rear frame bolts. Refer to Frame Replacement.
  9. Adjust the jackstand to lower the rear of the frame.
  10. Position a drain pan under the forward servo cover.

    11. Object Number: 164777 Size: SH
  11. Remove the servo cover bolts.
  12. Remove the forward servo cover.
  13. Remove the forward servo cover O-ring.
  14. Remove the servo piston assembly.
  15. Remove the servo spring.

Installation Procedure

    Object Number: 164777 Size: SH
  1. Install the servo spring.
  2. Install the piston assembly.
  3. Install the O-ring.
  4. Install the servo cover.

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

  5. Install the forward servo cover bolts.

    6. Tighten
    Tighten the bolts to 12 N·m (106 lb in).

  6. Remove the drain pan from under the forward servo cover.
  7. Adjust the jackstand to raise the rear of the frame.
  8. Install the frame bolts. Refer to Frame Replacement.
  9. Remove the support from the rear of the frame.
  10. Install the power steering lines to the right side of the frame.
  11. Install the engine mount lower nuts. Refer to Engine Mount Replacement - Right Side.
  12. Install the transaxle mount lower nuts. Refer to Transmission Mount Replacement - Left Side.
  13. Install the power steering gear. Refer to Steering Gear Replacement.
  14. Lower the vehicle.
  15. Remove the engine support fixture.
  16. Check and fill the transaxle as necessary.

    17. 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.

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