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Removal & Installation: Transmission: Removal

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  1. Disconnect the negative (-) battery cable.
  2. Drain the transmission fluid. See LUBRICATION in appropriate SERVICING article.
  3. Remove the rear drive shaft. See appropriate DRIVE SHAFTS & UNIVERSAL JOINTS article in DRIVELINE/AXLES.
  4. Support the transmission with a suitable jack.
  5. Remove the transmission mount nuts. See Fig 1 .
    Fig 1: Removing/Installing Transmission Support Bolts & Nuts
    G00207837Courtesy of GENERAL MOTORS CORP.
  6. Remove the transmission support bolts and nuts. See Fig 1 .
  7. Raise the transmission slightly and remove the transmission support from the vehicle.
  8. Remove the exhaust manifold pipe.
  9. Remove the transfer case, if equipped. See appropriate REMOVAL & INSTALLATION article in TRANSFER CASES.
  10. Remove the transmission mount bolts and mount. See Fig 2 .
    Fig 2: Removing/Installing Transmission Mount Bolts & Nuts
    G00191934Courtesy of GENERAL MOTORS CORP.
  11. Ensure the transmission manual shaft is positioned in mechanical park.
  12. Remove the retainer that secures the cable to the bracket. See Fig 3 .
  13. Remove the range selector cable end (2) from the transmission range selector lever ball stud (1). See Fig 4 .
    Fig 3: Removing/Installing Range Selector Cable From Bracket
    G00191935Courtesy of GM
    Fig 4: Identifying Range Selector Lever Ball Stud
    G00092163Courtesy of GM
  14. Depress the tangs and remove the cable from the bracket.
  15. Disconnect the following electrical connectors:
    • Input speed sensor (1). See Fig 5 .
    • Output speed sensor (3).
    • Park/neutral position (PNP) switch (5).
    • Transmission (4).
      Fig 5: Identifying Electrical Connectors
      G00207838Courtesy of GENERAL MOTORS CORP.
  16. Disconnect the oxygen sensor (HO2S) electrical connector.
  17. Disconnect the wire harness clip (2) from the bracket on the left side of the transmission.
  18. Cut the tie strap to separate the vent hose from the wiring harness.
  19. Remove the flywheel inspection cover. See Fig 6 .
    Fig 6: Removing/Installing Flywheel Inspection Cover
    G00207839Courtesy of GENERAL MOTORS CORP.
  20. Mark the torque converter to flywheel orientation.
  21. Remove the torque converter bolts.
  22. Remove the exhaust hanger mounting bracket bolts and brackets, if equipped. See Fig 7 and Fig 8 .
    Fig 7: Removing/Installing Exhaust Hanger Mounting Bracket (6.0L)
    G00207840Courtesy of GENERAL MOTORS CORP.
    Fig 8: Removing/Installing Exhaust Hanger Mounting Bracket (8.1L)
    G00207841Courtesy of GENERAL MOTORS CORP.
  23. Disconnect the transmission oil cooler lines. See Fig 9 .
  24. Plug the transmission oil cooler line fittings.
  25. Remove the stud on the left side of the transmission. See Fig 10 .
  26. Remove the remaining transmission studs. See Fig 11 .
    Fig 9: Disconnecting Transmission Oil Cooler Lines
    G00191939Courtesy of GM
    Fig 10: Removing/Installing Left Side Transmission Stud
    G00207842Courtesy of GENERAL MOTORS CORP.
    Fig 11: Removing/Installing Transmission Studs
    G00191941Courtesy of GM
  27. Install the Converter Holding Strap (J-21366) onto the transmission bell housing to retain the torque converter.
  28. Remove the transmission from the vehicle while simultaneously removing the fluid level indicator tube. Pull the transmission straight back.
  29. Remove the transmission from the vehicle.
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