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Home >> Hummer >> 2008 >> H3 Adventure, Automatic >> Repair and Diagnosis >> Transmission >> Hydraulic Diagrams >> Automatic Transmission - 4L60-E - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis >> On-Vehicle Repair Instructions >> Transmission Replacement (3.7L) >> Removal Procedure

Removal Procedure

  1. Ensure the vehicle is in the park position.
  2. Remove the filler tube. Refer to Transmission Fluid Filler Tube and Seal Replacement (3.7L)  or Transmission Fluid Filler Tube and Seal Replacement (5.3L) .
  3. Drain the transmission fluid if necessary. Refer to Automatic Transmission Fluid and Filter Replacement .
  4. Remove the transfer case assembly. Refer to Transfer Case Assembly Replacement .
    5. Fig 1: Range Selector Cable & Components
    GM1302081Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Do not pull on the boot portion of the cable.
  5. Complete the following in order to disconnect the range selector cable (3) from the transmission range selector lever ball stud.
    1. Insert a flat-bladed tool between the range selector cable end (5) and the range selector lever (1).
    2. Pry the range selector cable end (5) away from the range selector lever (1).
  6. Remove the retainer (4) from the range selector cable (3).
  7. Push the range selector cable locking tabs inward toward each other to release from the bracket (2).
    8. Fig 2: View Of Screw, Engine Wiring Harness And Transmission Main Electrical Connector
    GM1566667Courtesy of GENERAL MOTORS CORP.
  8. Disconnect the transmission main electrical connector (3).
  9. Remove the screw (1) securing the engine wiring harness (2) to the right side of the transmission, and position the harness over the transmission.
    10. Fig 3: View Of Park/Neutral Back Up Switch, Harness, Electrical Connector And Screw
    GM1564309Courtesy of GENERAL MOTORS CORP.
  10. Disconnect the park/neutral back up switch electrical connector (3).
  11. Remove the screw (2) securing the engine wiring harness (1) to the left side of the transmission, and position the wiring harness aside.
    12. Fig 4: Transmission Vent Hose & Retainers
    GM1302098Courtesy of GENERAL MOTORS CORP.
  12. Disconnect the transmission vent hose retainer (1) from the heater pipe bracket (2).
    13. Fig 5: Identifying Fuel Hose/Pipe Bracket & Nuts
    GM1564306Courtesy of GENERAL MOTORS CORP.
  13. Remove the nuts (2) securing the fuel hose/pipe bracket (1) to the transmission.
  14. Disconnect the fuel hose/pipe retainer (4) from the range selector cable bracket (3), and position aside the fuel hose/pipe bundle.
    15. Fig 6: View Of Inspection Plug
    GM1350754Courtesy of GENERAL MOTORS CORP.
  15. Remove the inspection plug (3) from the transmission (1).
  16. Mark the torque converter to flexplate/flywheel orientation to ensure proper realignment.
  17. Remove the engine protection shield in order to access the harmonic balancer bolt. Refer to Oil Pan Skid Plate Replacement .
    18. Fig 7: Locating Service Slot Plug
    GM1564311Courtesy of GENERAL MOTORS CORP.
  18. Remove the service slot plug (1).
  19. Repeat the following steps for all 3 torque converter bolts:
    • Rotate the harmonic balancer center bolt clockwise ONLY, in order to access the torque converter bolt through the service slot.
    • Remove the torque converter bolt using one of the following:
      • 18 mm crowfoot wrench
      • Short T50 TORX bit
  20. Place an oil pan under the transmission fluid cooler pipes.
  21. Disconnect the transmission oil cooler pipes from the transmission ONLY. Refer to Transmission Fluid Cooler Hose/Pipe Replacement .
  22. Plug the open outlet ports to prevent fluid loss and contamination.
  23. Support and secure the transmission using a suitable transmission jack.
  24. Remove the transmission crossmember. Refer to Transmission Support Crossmember Replacement .
    25. Fig 8: Identifying Transmission Mounting Bolts
    GM1564401Courtesy of GENERAL MOTORS CORP.
  25. Remove the 7 transmission mounting bolts and 2 studded mounting bolts (2).
  26. Position the heater pipe (1) out of the way to allow clearance for the transmission.
    27. Fig 9: Identifying Engine Alignment Dowels
    GM1564404Courtesy of GENERAL MOTORS CORP.
  27. Remove the remaining transmission mounting bolts (2).
  28. Separate the transmission from the engine alignment dowels (1).
    29. IMPORTANT: Ensure clearance is maintained between the transmission and the following:
    • The catalytic converter
    • The engine wiring harness
    • The fuel hose/pipe brackets
    • The heater pipe
    • The transmission oil cooler pipes
  29. Using the transmission jack, carefully lower the transmission from the vehicle.
    30. Fig 10: View Of J 21366 Installed On Torque Converter
    GM283776Courtesy of GENERAL MOTORS CORP.
  30. Install the J 21366  onto the transmission bell housing to retain the torque converter.
  31. Perform the flush and flow test on the automatic transmission oil cooler. Refer to Transmission Fluid Cooler Flushing and Flow Test (J 45096)  or Transmission Fluid Cooler Flushing and Flow Test (J 35944-A) .
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