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Home >> Hummer >> 2009 >> H2 4D Utility Pickup >> Repair and Diagnosis >> Transmission >> Hydraulic Diagrams >> Automatic Transmission - 6L80 - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis >> On-Vehicle Repair Instructions >> Transmission Replacement >> Removal Procedure

Removal Procedure

  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  3. Remove the catalytic converter guard. Refer to Catalytic Converter Guard Replacement .
  4. Remove the catalytic converter. Refer to Catalytic Converter Replacement .
  5. Drain the transmission then reinstall the fluid pan. Refer to Automatic Transmission Fluid, Fluid Pan and/or Filter Replacement .
  6. Remove the rear propeller shaft. Refer to Rear Propeller Shaft Replacement .
  7. Remove the front propeller shaft. Refer to Front Propeller Shaft Replacement .
    8. Fig 1: Identifying Torque Converter Access Plugs
    GM1971083Courtesy of GENERAL MOTORS CORP.
  8. Remove the torque converter access plugs (1, 2).
    9. Fig 2: Identifying Left Flex Plate Inspection Cover & Bolt
    GM1975098Courtesy of GENERAL MOTORS CORP.
  9. Remove the left flex plate inspection cover bolt (2).
  10. Remove the left flex plate inspection cover (1).
  11. Remove the starter motor. Refer to Starter Motor Replacement .
    12. Fig 3: Identifying Right Flex Plate Inspection Cover & Bolt
    GM1971084Courtesy of GENERAL MOTORS CORP.
  12. Remove the right flex plate inspection cover bolt (2).
  13. Remove the right flex plate inspection cover (1).
  14. Mark the torque converter relationship to the flex plate.
    15. Fig 4: Identifying Flex Plate To Torque Converter Bolts
    GM1971085Courtesy of GENERAL MOTORS CORP.
  15. Remove the flex plate to torque converter bolts (1).
  16. Support the transmission with a transmission jack.
  17. Remove the transmission support. Refer to Transmission Support Replacement .
  18. Remove the transmission mount. Refer to Transmission Mount Replacement .
  19. Lower the transmission to gain access to the top and sides of the transmission.
  20. Remove the transmission heat shield. Refer to Transmission Heat Shield Replacement .
  21. Remove the vent hose from the transmission and transfer case.
    22. Fig 5: Identifying Transmission Electrical Harness & Retaining Screw
    GM1971080Courtesy of GENERAL MOTORS CORP.
  22. Remove the transmission electrical harness retaining screw (1).
  23. Disconnect the transmission electrical harness connector (2).
    24. Fig 6: Identifying Fuel Pipe Bracket Screw & Nut
    GM1971078Courtesy of GENERAL MOTORS CORP.
  24. Remove the fuel pipe bracket screw (2).
  25. Remove the fuel pipe bracket nut (1).
    26. Fig 7: Identifying Range Selector Cable Components
    GM1971076Courtesy of GENERAL MOTORS CORP.
  26. disconnect the shift control cable (3) from the range select lever (4)
  27. Remove the shift control cable retainer (2).
  28. Remove the shift control cable (3) from the cable bracket (1).
  29. Remove the transfer case. Refer to Transfer Case Assembly Replacement .
    30. Fig 8: Identifying Transmission Cooler Lines & Bolt
    GM1705099Courtesy of GENERAL MOTORS CORP.
  30. Disconnect the transmission oil cooler lines from the transmission. Refer to Transmission Fluid Cooler Hose/Pipe Replacement .
  31. Plug the transmission oil cooler lines and line connection in the transmission case to prevent fluid loss and contamination.
    32. Fig 9: Identifying Transmission Bolts & Studs
    GM1971086Courtesy of GENERAL MOTORS CORP.
  32. Remove the bolts and studs (1-8) securing the transmission to the engine.
  33. Pull the transmission straight back.
  34. Install the J 21366  onto the transmission bell housing to retain the torque converter.
  35. Remove the transmission from the vehicle while simultaneously removing the fluid level indicator tube.
  36. Flush the transmission oil cooler and cooling lines if necessary. Refer to Transmission Fluid Cooler Flushing and Flow Test .
  37. Transfer any remaining components to the new transmission if the transmission is being replaced.
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