GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2006 🢒 Terraza - 4WD 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T65-E 🢒 Forward Servo Replacement

Removal Procedure
  1. Install the engine support fixture. Refer to Engine Support Fixture in Engine Mechanical  - 3.5L (LX9).
  2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  3. Remove the stabilizer shaft. Refer to Stabilizer Shaft Replacement in Front Suspension.
  4. Remove the power steering gear heat shield.
  5. Remove the power steering gear from the frame. Refer to Steering Gear Replacement in Power Steering System.

    6. Object Number: 378919 Size: SH
  6. Use a strap in order to secure the power steering gear to the exhaust manifold.
  7. Remove the power steering cooler line clamps from the frame. Refer to Power Steering Cooler Pipe/Hose Replacement in Power Steering System.
  8. Use wire in order to secure the power steering cooler line to an engine component.
  9. Remove the engine mount nuts. Refer to Engine Mount Replacement - Right Side in Engine Mechanical - 3.5L (LX9).
  10. Remove the transaxle mount nuts. Refer to Transmission Mount Replacement .
  11. Use a utility stand in order to support the frame front.
  12. Use a utility stand in order to support the frame rear.
  13. Remove the frame bolts.
  14. Use the utility stand in order to lower the frame rear for access to the forward servo cover.
  15. Position a drain pan under the forward servo cover.

    16. Object Number: 164777 Size: SH
  16. Remove the forward band servo cover bolts.
  17. Remove the forward servo cover.
  18. Remove the forward servo cover O-ring.
  19. Remove the servo piston assembly.
  20. Remove the servo spring.

Installation Procedure

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

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

  5. Install the forward band 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. Important: Ensure that the power steering cooler line does not become trapped or damaged during this step.

  7. Use the utility stand in order to raise the frame rear.
  8. Install the NEW frame bolts.
  9. Adjust the utility straps as necessary in order to align the powertrain mounts with the frame.
  10. Install the transaxle mount nuts. Refer to Transmission Mount Replacement .
  11. Install the engine mount nuts. Refer to Engine Mount Replacement - Right Side in Engine Mechanical - 3.5L (LX9).
  12. Install the power steering gear to the frame. Refer to Steering Gear Replacement in Power Steering System.
  13. Install the power steering gear heat shield.
  14. Install the stabilizer shaft. Refer to Stabilizer Shaft Replacement in Front Suspension.
  15. Lower the vehicle.
  16. Remove the engine support fixture. Refer to Engine Support Fixture in Engine Mechanical - 3.5L (LX9).
  17. Adjust the fluid level. Refer to the following information:
    18. •  Transmission Fluid Check
    •  Fluid and Lubricant Recommendations in Maintenance and Lubrication.
    •  Approximate Fluid Capacities in Maintenance and Lubrication.

    Important: It is recommended the ate 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.

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