GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2006 🢒 Pursuit 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T45-E 🢒 Intermediate/Fourth Servo Assembly Replacement

Removal Procedure

    Object Number: 893266 Size: SH
  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Remove the oil pan. Refer to Oil Pan Replacement .
  3. Remove the oil level control valve. Pull the valve straight down. Do not pry on the valve.
  4. Remove the oil filter and oil filter O-ring seal. The seal may stay in the case when the filter is removed.

    5. Object Number: 893225 Size: SH

    Important: Do not score or damage the transaxle case when removing the filter neck seal.

  5. Using a chisel, indent the top of the filter neck seal to relax the press fit.
  6. Remove the filter neck seal from the transaxle case and discard.

    7. Object Number: 893231 Size: SH
  7. Remove the intermediate/4th servo assembly bolts.
  8. Remove the intermediate/4th servo assembly.

Disassembly Procedure

    Object Number: 417997 Size: SH
  1. Remove the piston and pin assembly (76 and 77) from the servo cover (80).
  2. Remove the snap ring (70) from the servo pin (76).
  3. Remove the piston (77) and the servo cushion springs (68) from the servo pin (76).
  4. Remove the servo piston seals (78, 79) from the servo cover (80).
  5. Discard the servo piston seals (78 and 79). Do not reuse the servo piston seals.

    6. Object Number: 55105 Size: SH
  6. Inspect all components for damage.
  7. Inspect the fluid feed holes for proper opening.
  8. Inspect the bolt hole threads for debris and stripping.
  9. Inspect the seal grooves for damage.
  10. Clean and dry each component.

Assembly Procedure

    Object Number: 417997 Size: SH
  1. Install the servo cushion springs (68) and the servo piston (77) onto the servo pin (76).
  2. Install the snap ring (70) onto the servo pin (76) in order to retain the springs (68) and piston (77).
  3. Install the new seals (78 and 79) onto the servo piston (77) and the servo cover (80).
  4. Install the servo piston assembly into the servo cover (80). Lubricate the piston seals with transmission fluid in order to aid in assembly.

Installation Procedure

    Object Number: 893231 Size: SH
  1. Install the servo return spring into the transaxle case.
  2. Install the servo return spring into the transaxle case.

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

    Important: Hand start and tighten servo cover bolts evenly to prevent damage to servo cover bore.

  3. Hand start and install the servo cover bolts.

    4. Tighten
    Tighten the servo cover bolts to 12 N·m (9 lb ft).


    Object Number: 893226 Size: SH
  4. Install the new filter neck seal into the transaxle case. A large socket can be used as an installation tool. Two mallets can be used as well.

    5. Object Number: 893266 Size: SH
  5. Coat the filter O-ring with a small amount of petroleum jelly, and install the filter into the case.

    6. Notice: Push straight down on the center of the oil level control valve in order to prevent damage to the case bore.

  6. Install the oil level control valve.
  7. Install the oil pan. Refer to Oil Pan Replacement .
  8. Lower the vehicle.
  9. Remove the AIR. Refer to Transmission Fluid Check .
  10. Fill the transmission with DEXRON® VI fluid.
  11. Start the engine, warm up the transaxle, and check for leaks.
  12. Inspect the fluid level. Refer to Transmission Fluid Check .

    13. 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.

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