GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 1999 🢒 Firebird 🢒 Transmission/Transaxle 🢒 Manual Transmission - M49 🢒 Transmission Replacement

Transmission Replacement Removal

Tools Required

    • J 3289-20 Bench Mount Holding Fixture Base
    • J 36842 Transmission Holding Fixture
    • J 42055 Transmission Support Fixture
    • J 36221 Hydraulic Clutch Line Separator

    Object Number: 208241 Size: SH
  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  2. Remove the control assembly. Refer to Shift Control Assembly Replacement .
  3. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

    4. Object Number: 33364 Size: SH
  4. Drain the transmission fluid.
  5. Remove the propeller shaft. Refer to Two-Piece Propeller Shaft Replacement in Propeller Shaft.
  6. Support the rear axle with jack stands.
  7. Remove the rear axle torque arm. Refer to Torque Arm Replacement in Rear Suspension.
  8. Remove the catalytic converter. Refer to Catalytic Converter Replacement in Engine Exhaust.

    9. Object Number: 472129 Size: SH
  9. Disconnect the wire harness connectors from the speed sensor (1) and the backup lamp switch (3) on the left side.
  10. Remove the wiring harness clip bolt (2).

    11. Object Number: 472132 Size: SH
  11. Remove the wiring harness clip bolt (1) from the right side.
  12. Remove the starter motor. Refer to Starter Motor Replacement in Engine Electrical.

    13. Object Number: 349561 Size: SH
  13. Remove the left transmission brace bolts (2, 3).
  14. Remove the left transmission brace (1).

    15. Object Number: 448855 Size: SH
  15. Remove the right transmission brace bolts (2, 3, 4).
  16. Remove the right transmission brace (1).

    17. Object Number: 349560 Size: SH
  17. Remove the flywheel housing cover bolts (2).
  18. Remove the flywheel housing cover (3) from the transmission (1).

    19. Object Number: 43255 Size: SH
  19. Using J 36221 , depress the white circular release ring on the actuator cylinder hose and simultaneously pull lightly on the master cylinder hose to disconnect.
  20. Protect both hose coupling ends from dirt and damage.
  21. Support the engine with a safety stand.
  22. Install the J 42055 to the transmission jack.
  23. Support the transmission with the transmission jack.
  24. Remove the transmission support and mount. Refer to Transmission Support and Mount Assembly Replacement .

    25. Object Number: 441492 Size: SH
  25. Remove the flywheel housing bolts (1, 2) and nuts (3).
  26. Slowly lower the manual transmission (4) from the vehicle.
  27. Remove the vent hose from the transmission.
  28. Remove the clutch bleeder from the actuating cylinder.
  29. Remove the clutch line from the actuating cylinder.

    30. Object Number: 43256 Size: SH
  30. Remove the clutch actuator cylinder bolts (1).
  31. Remove the clutch actuator cylinder (2).

    32. Object Number: 472967 Size: SH
  32. Remove the transmission bolts (3).
  33. Remove the bellhousing (1) from the transmission (2).
  34. Install the J 36842 to the transmission, if necessary.
  35. Remove the transmission from the transmission stand.
  36. Install the transmission to the J 3289-20 , if necessary.

Transmission Replacement Installation


    Object Number: 472967 Size: SH
  1. Remove the transmission from the J 3289-20 , if necessary.
  2. Mount the transmission to the jack stand.
  3. Remove the J 36842 from the transmission, if necessary.
  4. Install the bellhousing (1) to the transmission (2).
  5. Install the transmission bolts (3).

    6. Tighten
    Tighten the transmission bolts (3) to 75 N·m (55 lb ft).


    Object Number: 43256 Size: SH
  6. Install the clutch actuator cylinder (2).
  7. Install the clutch actuator cylinder bolts (1).

    8. Tighten
    Tighten the clutch actuator cylinder bolts (1) to 8 N·m (71 lb in).

  8. Install the clutch line to the actuating cylinder.
  9. Install the clutch bleeder to the actuating cylinder.

    10. Object Number: 441492 Size: SH
  10. Slowly raise the manual transmission (4) to the vehicle.
  11. Install the flywheel housing bolts (1, 2) and nuts (3).

    12. Tighten
    Tighten the flywheel housing bolts (1, 2) and nuts (3) to 95 N·m (70 lb ft).

  12. Install the transmission support and mount. Refer to Transmission Support and Mount Assembly Replacement .
  13. Remove the transmission jack.
  14. Remove the J 42055 from the transmission jack.
  15. Remove the engine safety stand.

    16. Object Number: 43255 Size: SH

    Important: DO NOT rely on an audible click or a visual verification of the clutch hydraulic hose quick connect fitting connection.

  16. Connect the clutch actuator cylinder hose to the clutch master cylinder hose.

    17. Push together the clutch hydraulic hose quick connect fittings, then pull back on the fittings to verify engagement.

  17. Check the clutch hydraulic hoses for twists or kinks.

    18. Object Number: 349560 Size: SH
  18. Install the flywheel housing cover (3) to the transmission (1).
  19. Install the flywheel housing cover bolts (2).

    20. Tighten
    Tighten the flywheel housing cover bolts (2) to 9 N·m (80 lb in).


    Object Number: 448855 Size: SH
  20. Install the right transmission brace (1).
  21. Install the right transmission brace bolts (2, 3, 4).

    22. Tighten
    Tighten the right transmission brace bolts (2, 3, 4) to 50 N·m (37 lb ft).


    Object Number: 349561 Size: SH
  22. Install the left transmission brace (1).
  23. Install the left transmission brace bolts (2, 3).

    24. Tighten

        • Tighten the left transmission brace bolt (2) (to transmission) to 50 N·m (37 lb ft).
        • Tighten the left transmission brace bolts (3) (to engine ) to 28 N·m (21 lb ft).
  24. Install the starter motor. Refer to Starter Motor Replacement in Engine Electrical.

    25. Object Number: 472132 Size: SH
  25. Install the wiring harness clip bolt (1) to the right side of the transmission.

    26. Tighten
    Tighten the wiring harness clip bolt (1) to 11 N·m (97 lb in).


    Object Number: 472129 Size: SH
  26. Install the wiring harness clip bolt (2) to the left side of the transmission.

    27. Tighten
    Tighten the wiring harness clip bolt (2) to 11 N·m (97 lb in).

  27. Connect the speed sensor (1) and backup lamp switch (3) electrical connectors.
  28. Install the catalytic converter hanger assembly. Refer to Catalytic Converter Replacement in Engine Exhaust.
  29. Install the rear axle torque arm. Refer to Torque Arm Replacement in Rear Suspension.
  30. Install the propeller shaft. Refer to Two-Piece Propeller Shaft Replacement in Propeller Shaft.

    31. Object Number: 2327 Size: SH
  31. Fill transmission with fluid.
  32. Lower the vehicle.
  33. Install the control assembly. Refer to Shift Control Assembly Replacement .

    34. Object Number: 208241 Size: SH
  34. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  35. Bleed the clutch hydraulic system. Refer to Hydraulic Clutch Bleeding in Clutch.