GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2007 🢒 G6 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T45-E 🢒 Transmission Replacement

Removal Procedure

    Object Number: 1233683 Size: SH
  1. Remove the air intake duct. Refer to Air Cleaner Inlet Duct Replacement or Air Cleaner Outlet Resonator Replacement .
  2. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  3. Disconnect the transaxle wiring harness from the transaxle and the park neutral position (PNP) switch.

    4. Object Number: 1239109 Size: SH
  4. Remove the shift cable bracket front bolt and shift cable from the lever.
  5. Remove the transmission wiring harness from the retainer on the transmission.

    6. Object Number: 1581869 Size: SH
  6. If equipped with a 3.5L V6 engine, disconnect Bank 2, O2 sensor 1 electrical connector (4).

    7. Object Number: 1523736 Size: SH
  7. Remove the left exhaust manifold heat shield.
  8. Remove the exhaust manifold heat shield.

    9. Object Number: 1492084 Size: SH
  9. Remove the front exhaust pipe nuts (1).

    10. Object Number: 104580 Size: SH
  10. Remove the upper transmission to engine bolts and stud.
  11. Install the engine support fixture. Refer to Engine Support Fixture .
  12. Convertible ONLY, remove the transmission mount. Refer to Transmission Mount Replacement - Left Side .
  13. Support the radiator and condenser from above using the condenser tabs on each side.
  14. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .
  15. Remove the front wheels and tires. Refer to Tire and Wheel Removal and Installation .

    16. Object Number: 1492090 Size: SH
  16. Disconnect the Bank 2, O2 sensor 2 electrical connector (2).

    17. Object Number: 1492086 Size: SH
  17. Remove the left catalytic converter to right catalytic converter nuts (3).

    18. (Powertrain shown removed for clarity).

  18. Remove the left catalytic converter (1).
  19. If equipped with the LE5 engine, remove the exhaust manifold pipe. Refer to Exhaust Manifold Pipe Replacement .
  20. Remove the steering gear intermediate shaft .

    21. Important: It is only necessary to remove the control arms from the frame if the frame is being replaced.

  21. Remove the frame. Refer to Frame Replacement .
  22. Disconnect the wheel drive shafts from the transaxle. Refer to Wheel Drive Shaft Replacement .

    23. Object Number: 510437 Size: SH
  23. Remove the 3 bolts from the transmission brace near the right axle shaft.
  24. Remove the 3 oil pan to bellhousing bracket bolts.

    25. Object Number: 510441 Size: SH
  25. Remove the flywheel inspection cover.
  26. Remove the starter. Refer to Starter Motor Replacement .
  27. Mark the relationship of the flywheel to the torque converter for reassembly.
  28. Remove the torque converter to flywheel bolts.
  29. Remove the transmission oil cooler lines by removing the nut holding the bracket to the transaxle case.

    30. Object Number: 414901 Size: SH
  30. Disconnect the vehicle speed sensor (VSS) wiring harness from the sensor.
  31. Disconnect the rear heated oxygen sensor (HO2S) harness from the rear transmission mount.
  32. Remove the remaining (rear) bolt from the shift cable bracket.
  33. Remove the front transmission mount bracket from the transmission.
  34. Use a transmission jack in order to support the transmission.
  35. Remove the remaining bellhousing bolts and studs and separate the transmission from the engine.
  36. Lower the transmission with the transmission jack far enough to remove the transmission.
  37. If the transmission is being replace or installed in a holding fixture, remove the rear transmission mount bracket from the transmission.
  38. If the transmission is being replaced, remove the PNP switch from the transmission.

    39. Object Number: 104581 Size: SH
  39. If the transmission is being replaced, remove the transmission mount.

Installation Procedure
  1. If transmission is being replaced, install the following to the transmission:
    2. • The PNP switch
    • The torque converter clutch (TCC) lock up clutch O-ring.
    • Transfer the transaxle from the bench fixture to the transmission jack.
  2. Install the side cover transmission mount bracket to the transmission.
  3. Install the rear transmission mount bracket to the transmission.
  4. Position the transaxle in the vehicle.

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


    Object Number: 104580 Size: SH
  5. Install the lower transmission to engine bolts and nuts.

    6. Tighten
    Tighten the bolts and nuts to 90 N·m (66 lb ft).

  6. Install the front transmission mount bracket to the transmission.
  7. Install the wheel drive shafts to the transaxle. Refer to Wheel Drive Shaft Replacement .

    8. Object Number: 414901 Size: SH
  8. Connect the wiring harness to the VSS.

    9. Object Number: 475919 Size: SH
  9. Install the torque converter to flywheel bolts.

    10. Tighten
    Tighten the bolts to 62 N·m (46 lb ft).


    Object Number: 510441 Size: SH
  10. Install the starter. Refer to Starter Motor Replacement .
  11. Install the flywheel inspection cover bolts.

    12. Tighten
    Tighten the bolts to 10 N·m (89 lb in).

  12. Connect the transaxle oil cooler pipes to the transaxle.

    13. Tighten
    Tighten the pipes to 8 N·m (71 lb in).

  13. Install the 3 oil pan to bellhousing bracket bolts.

    14. Tighten
    Tighten the bolts to 72 N·m (53 lb ft).

  14. Install the 3 bolts to the transmission brace at the final drive area and tighten.
  15. Remove the transmission jack.
  16. Install the frame. Refer to Frame Replacement .
  17. Install the engine splash shields.
  18. Install the front wheels and tires. Refer to Tire and Wheel Removal and Installation .
  19. Lower the vehicle.
  20. Convertible ONLY, install the transmission mount. Refer to Transmission Mount Replacement - Left Side .
  21. Remove the radiator and condenser support and the engine support fixture.
  22. Install the upper transmission to engine bolts and stud.

    23. Tighten
    Tighten the bolts/stud to 90 N·m (66 lb ft).


    Object Number: 1239109 Size: SH
  23. Install the shift cable bracket and shift cable to the lever.

    24. Object Number: 1492084 Size: SH
  24. If equipped with a LX9 engine, install the left catalytic converter (3). Refer to Catalytic Converter Replacement - Left Side .

    25. Object Number: 1492090 Size: SH
  25. Connect Bank O2 sensor 2 electrical connector (1).

    26. Object Number: 1523736 Size: SH
  26. Install the left exhaust manifold heat shield.
  27. Install the heat shield bolts.

    28. Tighten
    Tighten the bolts to 10 N·m (89 lb in).


    Object Number: 1581869 Size: SH
  28. Connect Bank 2, O2 sensor 1 electrical connector (4).
  29. If equipped with a LE5 (L4) engine, install the exhaust manifold pipe. Refer to Exhaust Manifold Pipe Replacement .

    30. Object Number: 1233683 Size: SH
  30. Connect the electrical connectors to the PNP switch and transaxle.
  31. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  32. Install the air intake duct. Refer to Air Cleaner Inlet Duct Replacement or Air Cleaner Outlet Resonator Replacement .
  33. Add automatic transmission fluid (ATF) and verify the proper fluid level of the transaxle.

    34. 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.

  34. Reset the TAP values. Refer to Transmission Adaptive Functions .
  35. Road test the vehicle.