GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 35944-A Transmission Oil Cooler Flusher

Removal Procedure

Important: Transmission oil circulates between the transmission assembly and the transfer case. In situations where transmission related failures circulate debris into the transfer case, the transfer case must be disassembled, cleaned, and inspected for damage.

  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

  2. Object Number: 1395562  Size: SH
  3. Remove the transmission lower bell housing bolt located between the engine oil pan and the transmission oil pan.
  4. Remove the powertrain (engine, transmission, frame) from the vehicle. Refer to Engine Replacement in Engine Mechanical - 3.5L or Engine Replacement in Engine Mechanical - 3.6L (LY7).

  5. Object Number: 368795  Size: MH
  6. Remove the fluid filler tube nut from the exhaust gas recirculation (EGR) valve.
  7. Remove the fluid filler tube bolt from the transaxle.
  8. Remove the fluid filler tube.

  9. Object Number: 1395501  Size: SH
  10. Remove the transmission bell housing bolts (2).

  11. Object Number: 160961  Size: MH
  12. Remove the transaxle brace bolts.
  13. Remove the transaxle brace.
  14. If the vehicle is equipped with AWD (M76), remove the transaxle brace bolts and nuts.
  15. Remove the transaxle brace.
  16. Remove the coolant inlet pipe. Refer to Radiator Inlet Hose Replacement in Engine Cooling.
  17. Use a utility stand with a block of wood in order to support the transaxle.

  18. Object Number: 368791  Size: SH
  19. Remove the transaxle mount upper nuts.

  20. Object Number: 161246  Size: SH
  21. Remove the transaxle mount bracket bolts.
  22. Remove the transaxle mount bracket.

  23. Object Number: 1644900  Size: SH
  24. If equipped with LX9, remove the starter motor bolts.
  25. Remove the starter motor.

  26. Object Number: 1394040  Size: SH
  27. If equipped with LY7, remove the starter motor bolts.
  28. Remove the starter motor.
  29. Remove the torque converter bolts. Refer to Flywheel to Torque Converter Bolt Replacement .

  30. Object Number: 1395483  Size: SH
  31. Remove the transmission upper brace nut located behind the power steering pump and above the transfer case.

  32. Object Number: 1395453  Size: SH
  33. Remove the transmission upper brace bolts (1, 2).
  34. Remove the transmission upper brace.

  35. Object Number: 1395484  Size: SH
  36. Remove the transmission bolt near the crank sensor and the engine coolant (block) heater.
  37. Separate the transmission from the engine.
  38. Install the transaxle to the transmission support fixture. Refer to Transmission Support Fixture Assemble in Automatic Transaxle - 4T65-E Unit Repair.
  39. If the vehicle is equipped with AWD (M76), remove the transfer case. Refer to Transfer Case Removal in Automatic Transaxle - 4T65-E Unit Repair.
  40. Flush the transaxle oil cooler and the transaxle oil cooler hoses. Refer to Transmission Fluid Cooler Flushing and Flow Test .

Installation Procedure

Important: If you are replacing the transaxle, transfer case or any internal components, you must inspect the end play and adjust as needed. Refer to Transmission to Transfer Case End Play Check in Automatic Transaxle - 4T65-E Unit Repair.

  1. If the vehicle is equipped with AWD (M76), install the transfer case. Refer to Transfer Case Installation in Automatic Transaxle - 4T65-E Unit Repair.
  2. Remove the transmission support fixture.

  3. Object Number: 1395501  Size: SH
  4. Use the dowel locator pins (1) in order to align and install the transmission to the engine.
  5. Notice: Refer to Fastener Notice in the Preface section.

  6. Install the transmission bell housing bolts (2).
  7. Tighten
    Tighten the transmission bell housing bolts to 50 N·m (37 lb ft).


    Object Number: 1395484  Size: SH
  8. Install the transmission bell housing bolt near the crank sensor and the engine coolant (block) heater.
  9. Tighten
    Tighten the transmission bell housing bolt to 50 N·m (37 lb ft).


    Object Number: 1395453  Size: SH
  10. Install the transmission upper brace.
  11. Install the transmission upper brace bolts.
  12. Tighten

        • Tighten the transmission upper brace outboard bolts (2) to 23 N·m (17 lb ft).
        • Tighten the transmission upper brace inboard bolts (1) to 50 N·m (37 lb ft).

    Object Number: 1395483  Size: SH
  13. Install the transmission upper brace nut located behind the power steering pump and above the transfer case.
  14. Tighten
    Tighten the transmission upper brace nut to 50 N·m (37 lb ft).

  15. Install the torque converter bolts. Refer to Flywheel to Torque Converter Bolt Replacement .

  16. Object Number: 1644900  Size: SH
  17. If equipped with LX9, install the starter motor.
  18. Install the starter motor bolts.
  19. Tighten
    Tighten the starter motor bolts to 40 N·m (30 lb ft).


    Object Number: 1394040  Size: SH
  20. If equipped with LY7, install the starter motor.
  21. Install the starter motor bolts.
  22. Tighten
    Tighten the starter motor bolts to 50 N·m (37 lb ft).

  23. Position the transaxle mount bracket.

  24. Object Number: 161246  Size: SH
  25. Install the transaxle mount bracket bolts.
  26. Tighten
    Start with the forward lower bolt and work clockwise to tighten the transaxle mount bracket bolts to 95 N·m (70 lb ft).

  27. Remove the utility stand.

  28. Object Number: 368791  Size: SH
  29. Install the transaxle mount upper nuts.
  30. Tighten
    Tighten the transaxle mount upper nuts to 47 N·m (35 lb ft).

  31. Install the coolant inlet pipe. Refer to Radiator Inlet Hose Replacement in Engine Cooling.
  32. If the vehicle is equipped with AWD (M76), install the transfer case brace.
  33. Install the transfer case brace bolts and nuts.
  34. Tighten

        • Tighten the transfer case brace bolts to 50 N·m (37 lb ft).
        • Tighten the transfer case brace nuts to 50 N·m (37 lb ft).

    Object Number: 160961  Size: MH
  35. Install the transaxle brace.
  36. Install the transaxle brace bolts.
  37. Tighten
    Tighten the bolts to 43 N·m (32 lb ft).


    Object Number: 1395501  Size: SH
  38. Use the dowel locator pins (1) in order to align and install the transmission to the engine.
  39. Install the bell housing bolts (2).
  40. Tighten
    Tighten the bolts to 50 N·m (37 lb ft).


    Object Number: 368794  Size: SH

    Important: Do NOT place the fluid filler tube seal on the fluid filler tube when installing the tube or damage to the seal will result.

  41. Install the fluid filler tube seal in the transaxle.
  42. Install the filler tube.

  43. Object Number: 368795  Size: MH
  44. Install the fluid filler tube bolt.
  45. Tighten
    Tighten the bolt to 13 N·m (115 lb in).

  46. Install the fluid filler tube nut.
  47. Tighten
    Tighten the nut to 13 N·m (115 lb in).

  48. Install the powertrain (engine, transmission, frame) to the vehicle. Refer to Engine Replacement in Engine Mechanical - 3.5L or Engine Replacement in Engine Mechanical - 3.6L (LY7).

  49. Object Number: 1395562  Size: SH
  50. Install the transmission lower bell housing bolt located between the engine oil pan and the transmission oil pan.
  51. Tighten
    Tighten the transmission bell housing bolt to 50 N·m (37 lb ft).

  52. Lower the vehicle.
  53. Inspect and adjust the transaxle fluid level as needed. Refer to the following information:
  54. •  Transmission Fluid Check
    •  Fluid and Lubricant Recommendations
    •  Approximate Fluid Capacities

    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.

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