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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1626 (Automatic Transmission - 4L80-E - Service & Replacement) >> Repair Instructions >> Transmission Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 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 .
  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 .
  4. Support the transmission with a suitable jack.
  5. Remove the transmission support. Refer to Transmission Support Replacement in Frame and Underbody.
  6. Remove the exhaust manifold pipe.
  7. Remove the transmission mount. Refer to Transmission Mount Replacement   . 
    8. Fig 1: Removing Transmission Mount
    G01952444Courtesy of GENERAL MOTORS CORP.
  8. Remove the transfer case, if equipped. Refer to TRANSFER CASE ASSEMBLY REPLACEMENT for NVG 149-NP or TRANSFER CASE ASSEMBLY REPLACEMENT for NVG 236/246-NP8.
  9. Remove the range selecter cable from the transmission range selecter 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.
    Fig 2: Disconnecting Wire Harness From Wire Loom
    G01952445Courtesy of GENERAL MOTORS CORP.
  13. Remove the flywheel inspection cover.
  14. Mark the torque converter to flywheel orientation.
  15. Remove the torque converter bolts.
    Fig 3: Removing Torque Converter & Bolts
    G01952446Courtesy of GENERAL MOTORS CORP.
  16. Remove the transmission heat shield.
    Fig 4: Removing Transmission Heat Shield
    G01952447Courtesy of GENERAL MOTORS CORP.
  17. Disconnect the transmission oil cooler lines from the transmission. Refer to Transmission Oil Cooler Line Quick Connect Fitting   . 
  18. Plug the transmission oil cooler line connectors in the transmission case.
    Fig 5: Plugging Transmission Oil Cooler Line Connectors In Transmission Case
    G01952448Courtesy of GENERAL MOTORS CORP.
  19. Remove the stud and the bolt on the right side securing the transmission to the engine.
    Fig 6: Removing Stud & Bolt
    G01952449Courtesy 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. Fig 7: Removing Studs & Bolt Securing Transmission To Engine
    G01952450Courtesy of GENERAL MOTORS CORP.
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