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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 834 (Automatic Transmission - 4L80-E/4L85-E (Service & Replacement)) >> Repair Instructions >> Transmission Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2003 GMC Yukon XL, 2003 Chevrolet Suburban, and 2003 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 DISCONNECT CAUTION in Engine Electrical.
  2. Drain the transmission fluid. Refer to AUTOMATIC TRANSMISSION FLUID/FILTER REPLACEMENT  .
  3. Remove the rear propeller shaft. Refer to PROPELLER SHAFT REPLACEMENT - REAR in Propeller Shaft.
  4. Support the transmission with a suitable jack.
  5. Remove the transmission mount nuts.
    Fig 1: Removing Transmission Support & Bolts/Nuts
    G02112315Courtesy of GENERAL MOTORS CORP.
  6. Remove the transmission support bolts/nuts.
  7. Remove the transmission support.
  8. Raise the transmission slightly and remove the transmission support from the vehicle.
  9. Remove the exhaust manifold pipe. Refer to EXHAUST MANIFOLD PIPE REPLACEMENT (6.0L AND 8.1L ENGINES) in Engine Exhaust.
  10. Remove the transfer case, if equipped. Refer to:
    Fig 2: Removing Transmission Support & Bolts/Nuts
    G02112316Courtesy of GENERAL MOTORS CORP.
  11. Remove the transmission mount bolts and mount.
    Fig 3: Removing Transmission Mount & Bolts
    G02112317Courtesy of GENERAL MOTORS CORP.
  12. Ensure the transmission manual shaft is positioned in mechanical park.
  13. Remove the retainer that secures the cable to the bracket.
    Fig 4: Removing Retainer That Secures Cable To Bracket
    G02112318Courtesy of GENERAL MOTORS CORP.
  14. Remove the range selector cable end (2) from the transmission range selector lever ball stud (1).
  15. Depress the tangs and remove the cable from the bracket.
    Fig 5: Removing Range Selector Cable End From Transmission Range Selector Lever Ball Stud
    G02112319Courtesy of GENERAL MOTORS CORP.
  16. Disconnect the following electrical connectors:
    • Input speed sensor (1)
    • Output speed sensor (3)
    • Park/neutral position (PNP) switch (5)
    • Transmission (4)
  17. Disconnect the oxygen sensor (HO2S) electrical connector.
  18. Disconnect the wire harness clip (2) from the bracket on the left side of the transmission.
  19. Cut the tie strap to separate the vent hose from the wiring harness.
    Fig 6: Disconnecting Wire Harness Clip From Bracket
    G02112320Courtesy of GENERAL MOTORS CORP.
  20. Remove the flywheel inspection cover.
  21. Mark the torque converter to flywheel orientation.
  22. Remove the torque converter bolts.
    Fig 7: Removing Torque Converter & Bolts
    G02112321Courtesy of GENERAL MOTORS CORP.
  23. If equipped with a 6.0L engine, remove the exhaust hanger mounting bracket bolts and bracket.
    Fig 8: Removing Exhaust Hanger Mounting Bracket & Bolts
    G02112322Courtesy of GENERAL MOTORS CORP.
  24. If equipped with a 6.0L or 8.1L engine, remove the exhaust hanger mounting bracket bolts and bracket.
    Fig 9: Removing Exhaust Hanger Mounting Bracket Bolts & Bracket
    G02112323Courtesy of GENERAL MOTORS CORP.
  25. Disconnect the transmission oil cooler lines. Refer to TRANSMISSION OIL COOLER LINE QUICK CONNECT FITTING  .
  26. Plug the transmission oil cooler line fittings.
    Fig 10: Disconnecting Transmission Oil Cooler Lines
    G02112324Courtesy of GENERAL MOTORS CORP.
  27. Remove the stud on the left side of the transmission.
    Fig 11: Removing Stud On Left Side Of Transmission
    G02112325Courtesy of GENERAL MOTORS CORP.
  28. Remove the remaining transmission studs.
  29. Install the J 21366  onto the transmission bell housing to retain the torque converter.
  30. Pull the transmission straight back.
  31. Remove the transmission from the vehicle.
    Fig 12: Removing Transmission Studs
    G02112326Courtesy of GENERAL MOTORS CORP.
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