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Home >> Chevrolet >> 2005 >> Chevy Express H1500, Van Passenger >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Automatic Transmission - 4L80-E/4L85-E - Introduction & Repair Instructions) >> Repair Instructions >> Transmission Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Automatic Transmission Range Selector Cable
    GM105219Courtesy of GENERAL MOTORS CORP.
    CAUTION: Refer to Battery Disconnect Caution in Cautions and Notices.
  1. Disconnect the battery negative cable assembly from the battery negative terminal.
  2. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  3. Support the vehicle with safety stands.
  4. If equipped with All Wheel Drive (AWD), remove the transfer case. Refer to Transfer Case Assembly Replacement in Driveline/Axle.
  5. Disconnect the range selector cable from the transmission bracket and from the range selector lever.
  6. Remove the rear propeller shaft. Refer to Propeller Shaft Replacement - One Piece or Propeller Shaft Replacement - Two Piece in Driveline Axle.
  7. Support the transmission with a transmission jack.
  8. Remove the transmission support. Refer to Transmission Support Replacement in Frame and Underbody.
  9. Remove the exhaust pipe from the exhaust manifolds and the muffler assembly from the exhaust pipe. Refer to Catalytic Converter Replacement (4.3L) or Catalytic Converter Replacement (Dual Exhaust - Right) or Catalytic Converter Replacement (Dual Exhaust - Left) in Engine Exhaust.
  10. Remove the starter motor. Refer to Starter Motor Replacement (4.8L, 5.3L, and 6.0L) or Starter Motor Replacement (4.3L) in Engine Electrical.
  11. Mark the flywheel and the torque converter alignment.
    12. Fig 2: Torque Converter, Engine Flywheel & Bolts
    GM609227Courtesy of GENERAL MOTORS CORP.
  12. Remove the bolts that attach the torque converter to the engine flywheel.
    13. Fig 3: Transmission-To-Engine Bolts
    GM609232Courtesy of GENERAL MOTORS CORP.
  13. Remove the transmission vent hose and the wiring harness from the transmission.
  14. Remove the transmission fluid fill tube and the fill tube seal from the transmission. Refer to Filler Tube and Seal Replacement 
  15. Plug the fluid fill tube opening in the transmission.
  16. Disconnect the transmission oil cooler pipes from the transmission. Refer to Transmission Fluid Cooler Hose/Pipe Replacement .
  17. Plug the transmission oil cooler pipe connectors in the transmission case.
    18. Fig 4: Vehicle Harness Wires, Harness Clips, Tubes, Brackets & Lines That May Interfere With Transmission Removal
    GM609237Courtesy of GENERAL MOTORS CORP.
  18. Disconnect the wiring harness connectors from the transmission vehicle speed sensor and the park/neutral position switch.
  19. Remove all vehicle harness wires, harness clips, tubes, brackets, and lines that may interfere with the removal of the transmission from the vehicle.
    20. Fig 5: Transmission-To-Engine Bolts
    GM609232Courtesy of GENERAL MOTORS CORP.
  20. Remove the studs and the bolts securing the transmission to the engine.
  21. Pull the transmission straight back.
  22. Remove the transmission from the vehicle.
  23. Inspect all the components for wear and damage.
  24. Inspect all the seals and the fittings for signs of wear.
  25. Inspect the torque converter for stripped or broken weld nuts.
  26. Inspect the transmission case for cracks.
  27. Perform the automatic transmission oil cooler flushing and flow test. 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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