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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 981 (Automatic Transmission - 4L80-E/4L85-E (Introduction, Service & Replacement)) >> Repair Instructions >> Transmission Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Drain the transmission fluid. Refer to Automatic Transmission Fluid/Filter Replacement .
  3. Remove the rear propeller shaft. Refer to Propeller Shaft Replacement - One Piece or Propeller Shaft Replacement - Two Piece in Propeller Shaft.
  4. Support the transmission with a suitable jack.
    Fig 1: Identifying Crossmember & Bolts
    GM652595Courtesy of GENERAL MOTORS CORP.
  5. Remove the transmission support. Refer to Transmission Support Replacement in Frame and Underbody.
  6. Remove the exhaust manifold pipe. Refer to Exhaust Manifold Pipe Replacement (6.0L, 6.6L, and 8.1L Engines) in Engine Exhaust.
  7. Remove the transmission mount. Refer to Transmission Mount Replacement .
  8. Remove the transfer case, if equipped. Refer to Transfer Case Assembly Replacement in Transfer Case NVG 149-NP (One Speed Automatic) or Transfer Case Assembly Replacement in Transfer Case NVG 236/246-NP8 (Two Speed Automatic).
    9. Fig 2: Removing The Range Selector Cable From The Transmission Range Selector Lever Ball Stud
    GM394469Courtesy of GENERAL MOTORS CORP.
  9. Remove the range selector cable from the transmission range selector lever ball stud and bracket. Refer to Automatic Transmission Range Selector Cable Replacement .
  10. Disconnect the electrical harness from the park/neutral position switch, the input speed sensor, and the output speed sensor.
  11. Disconnect the wire harness from the wire loom on the left side of the transmission.
  12. Cut the tie strap to separate the vent hose from the wiring harness.
    13. Fig 3: Removing The Flywheel Inspection Cover
    GM394458Courtesy of GENERAL MOTORS CORP.
  13. Remove the flywheel inspection cover.
  14. Mark the torque converter to flywheel orientation.
  15. Remove the torque converter bolts.
    16. Fig 4: Removing The Transmission Heat Shield
    GM102545Courtesy of GENERAL MOTORS CORP.
  16. Remove the transmission heat shield.
    17. Fig 5: Disconnecting The Transmission Oil Cooler Lines From The Transmission
    GM396807Courtesy of GENERAL MOTORS CORP.
  17. Disconnect the transmission oil cooler lines from the transmission. Refer to Transmission Fluid Cooler Line Quick Connect Fitting .
  18. Plug the transmission oil cooler line connectors in the transmission case.
    19. Fig 6: Removing The Stud And The Bolt On The Right Side Securing The Transmission To The Engine
    GM394454Courtesy of GENERAL MOTORS CORP.
  19. Remove the stud and the bolt on the right side securing the transmission to the engine.
    20. Fig 7: Removing The Remaining Six Studs And The One Bolt Securing The Transmission To The Engine
    GM394452Courtesy of GENERAL MOTORS CORP.
  20. Remove the remaining six studs and the one bolt securing the transmission to the engine.
  21. Install the J 21366 onto the transmission bell housing to retain the torque converter.
  22. Pull the transmission straight back.
  23. Remove the transmission from the vehicle.
  24. Flush the transmission oil cooler and lines at this time. Refer to Automatic Transmission Oil Cooler Flushing and Flow Test (J 35944-A) or Automatic Transmission Oil Cooler Flushing and Flow Test (J 45096) .
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