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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 360 (Automatic Transmission - 6L80/6L90 - Repair Instructions - On Vehicle) >> Repair Instructions - On Vehicle >> Transmission Replacement >> Removal Procedure

Removal Procedure

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  2. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .
  3. Remove the rear propeller shaft. Refer to Rear Propeller Shaft Replacement .
  4. Support the transmission with a transmission jack.
  5. Remove the transmission crossmember. Refer to Transmission Support Crossmember Replacement (4WD 2500 Series) , Transmission Support Crossmember Replacement (4WD 1500 Series) , Transmission Support Crossmember Replacement (2WD 2500 Series) , Transmission Support Crossmember Replacement (2WD 1500 Series) .
  6. Remove the transmission mount. Refer to Transmission Mount Replacement (2WD) , Transmission Mount Replacement (4WD) .
  7. Remove the catalytic converter pipe. Refer to Catalytic Converter Replacement (with Exhaust Clamp) .
  8. If the vehicle is equipped with a transfer case, remove the front propeller shaft. Refer to Front Propeller Shaft Replacement .
    9. Fig 1: Torque Converter Access Plug
    GM408374Courtesy of GENERAL MOTORS CORP.
  9. Remove the torque converter access plug.
    10. Fig 2: Left Flywheel Inspection Cover
    GM1708215Courtesy of GENERAL MOTORS CORP.
  10. Remove the left flywheel inspection cover.
  11. Remove the starter motor. Refer to Starter Replacement .
    12. Fig 3: Right Flywheel Inspection Cover
    GM1705430Courtesy of GENERAL MOTORS CORP.
  12. Remove the right flywheel inspection cover.
  13. Mark the relationship of the flywheel to the torque converter for reassembly.
    14. Fig 4: Flywheel To Torque Converter Bolts
    GM1708265Courtesy of GENERAL MOTORS CORP.
  14. Remove the flywheel to torque converter bolts.
  15. Lower the transmission to gain access to the top and sides of the transmission.
    16. Fig 5: Transfer Case Vent Tube Hose
    GM1708319Courtesy of GENERAL MOTORS CORP.
  16. Disconnect the vent tube hose and the electrical connections from the transfer case, if equipped.
  17. Remove the transfer case, if equipped. Refer to the appropriate procedure:
    18. Fig 6: Transmission Heat Shield And Bolts
    GM1708338Courtesy of GENERAL MOTORS CORP.
  18. Remove the 2 bolts securing the heat shield to the transmission.
  19. Remove the transmission heat shield.
    20. Fig 7: Range Selector Cable And Cable Bracket Retainer
    GM1707190Courtesy of GENERAL MOTORS CORP.
  20. Remove the range selector cable retaining clip (1) from the transmission range selector cable.
  21. Remove the range selector cable (2) from the range selector lever ball stud and the range selector cable bracket.
    22. Fig 8: Transmission Vent Hose
    GM1705102Courtesy of GENERAL MOTORS CORP.
  22. Disconnect the transmission vent hose.
  23. Disconnect the transmission electrical connector by pulling the white plastic tab, located on the connector circular ring (approximately 15 x 15 mm), outward and then rotate the circular ring of the connector counterclockwise. When the circular ring is disengaged, pull the connector straight out. Outward means away from transmission centerline, counterclockwise is looking at connector from rear of transmission.
  24. Remove the wire harness from the transmission.
    25. Fig 9: Bolt Securing Fuel Line Bracket To Left Side Of Transmission
    GM396800Courtesy of GENERAL MOTORS CORP.
  25. Remove the bolt that secures the fuel line bracket to the left side of the transmission.
    26. Fig 10: Oil Cooling Lines And Bolt
    GM1705099Courtesy of GENERAL MOTORS CORP.
  26. Disconnect the transmission oil cooler lines (1) from the transmission. Refer to Transmission Fluid Cooler Hose/Pipe Replacement .
  27. Plug the transmission oil cooler line connectors in the transmission case.
    28. Fig 11: Transmission Mounting Bolts
    GM1708536Courtesy of GENERAL MOTORS CORP.
  28. Remove the 8 bolts securing the transmission to the engine.
  29. Pull the transmission straight back.
  30. Install the J 21366 onto the transmission bell housing to retain the torque converter.
  31. Remove the transmission from the vehicle while simultaneously removing the fluid level indicator tube.
  32. Flush the transmission cooler lines. Refer to Transmission Fluid Cooler Flushing and Flow Test .
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