GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2008 🢒 Impala 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T65-E 🢒 Forward Servo Replacement

Removal Procedure
  1. Install the engine support fixture. Refer to the following:
    2. •  Engine Support Fixture for the 3.5L engine
    •  Engine Support Fixture for the 3.9L engine
    •  Engine Support Fixture for the 5.3L engine
  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 the following:
    6. •  Engine Mount Replacement for the 3.5L engine
    •  Engine Mount Replacement for the 3.9L engine
    •  Engine Mount Replacement - Right Side for the 5.3L engine
  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 spring.
  2. Install the piston assembly.
  3. Install the O-ring.
  4. Install the servo cover.

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

  5. Install the 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 in order 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 the following:
    12. •  Engine Mount Replacement for the 3.5L engine
    •  Engine Mount Replacement for the 3.9L engine
    •  Engine Mount Replacement - Right Side for the 5.3L engine
  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. Important: It is recommended that the 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.

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

    17. Notice: Do not overfill the transmission. Overfilling will result in foaming, loss of fluid, and possible damage to the transmission.

  17. Check and fill the transaxle as necessary.