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Home › Hummer › 2003 › H2 › Repair and Diagnosis › Transmission › Automatic Trans › Automatic Transmission - Introduction, Removal & Installation & Service › Repair Instructions › Transmission Replacement › Removal Procedure

Removal Procedure

    CAUTION: Refer to Battery Disconnect Caution .
  1. Disconnect the battery.
  2. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  3. Support the transmission with a transmission jack.
  4. Remove the exhaust pipe assembly. Refer to Catalytic Converter Replacement (Right Hand) or Catalytic Converter Replacement (Left Hand) in Engine Exhaust.
  5. Remove the starter motor. Refer to Starter Motor Replacement .
  6. Lower the transmission to gain access to the top and sides of the transmission.
  7. Remove the transfer case. Refer to Transfer Case Assembly Replacement .
  8. Remove the shift cable end from the transmission shift lever ball stud and the pan rail bracket. Refer to Automatic Transmission Range Selector Cable Replacement .
    9. Fig 1: View Of Transmission Heat Shield Bolts & Shield
    GM394459Courtesy of GENERAL MOTORS CORP.
  9. Remove the transmission heat shield.
  10. Disconnect the transmission vent hose, the park/neutral position switch connector, and the main electrical connector from the transmission. Refer to Park/Neutral Position Switch Replacement .
    11. Fig 2: View Of Bolt Securing Fuel Line Bracket To Left Side Of Transmission
    GM396800Courtesy of GENERAL MOTORS CORP.
  11. Remove the bolt that secures the fuel line bracket to the left side of the transmission.
  12. Remove the torque converter access plug.
  13. Remove the flywheel to torque converter bolts.
  14. Disconnect the transmission oil cooler lines from the transmission. Refer to Transmission Fluid Cooler Hose/Pipe Replacement .
  15. Plug the transmission oil cooler line connectors in the transmission case.
  16. Remove the transmission fill tube retaining nut from the transmission stud.
  17. Remove the engine harness bracket retaining nuts from the transmission studs.
  18. Remove the fill tube from the transmission.
  19. Remove the engine harness brackets from the transmission studs and position aside.
    20. Fig 3: Identifying Stud & Bolt Securing Transmission To Engine (Right Side)
    GM394448Courtesy of GENERAL MOTORS CORP.
  20. Remove the bolts securing the transmission to the engine oil pan.
    21. Fig 4: Identifying Six Studs & One Bolt Securing Transmission To Engine
    GM394446Courtesy of GENERAL MOTORS CORP.
  21. Remove the six studs and one bolt securing the transmission to the engine.
  22. Pull the transmission straight back.
  23. Remove the transmission from the vehicle while simultaneously removing the fluid level indicator tube.
  24. Perform the automatic transmission oil cooler flushing and flow test. Refer to Automatic Transmission Oil Cooler Flushing and Flow Test (J 45096) or Automatic Transmission Oil Cooler Flushing and Flow Test (J 35944-A) .
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