GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2006 🢒 GTO 🢒 Transmission/Transaxle 🢒 Manual Transmission - Tremec 6-Speed 🢒 Transmission Replacement

Removal Procedure

    Object Number: 33370 Size: SH
  1. Remove the transmission shift control. Refer to Shift Control Assembly Replacement .
  2. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .
  3. Remove the transmission oil drain plug.
  4. Drain the oil from the transmission.
  5. Support the rear of the vehicle with safety stands.
  6. Remove the catalytic converters . Refer to Catalytic Converter Replacement .
  7. Remove the propeller shaft. Refer to Two-Piece Propeller Shaft Replacement .
  8. Remove the starter motor. Refer to Starter Motor Replacement .

    9. Object Number: 477352 Size: SH
  9. Remove the clip (1) from the transmission.
  10. Disconnect the backup lamp switch electrical connector (2).

    11. Object Number: 477355 Size: SH
  11. Disconnect the following electrical connectors:
    12. • Skip shift solenoid (1)
    • Reverse lockout solenoid (2)
    • Vehicle speed sensor (3)
  12. Remove the push in retainer (4) and wiring harness bracket.
  13. Support the engine with safety stands.

    14. Object Number: 1373933 Size: SH
  14. Remove the right transmission close-out cover and bolt (1).

    15. Object Number: 1373934 Size: SH
  15. Remove the left transmission close-out cover and bolt (1).

    16. Object Number: 1373937 Size: SH
  16. Remove the retaining clip (1), then disconnect the clutch hydraulic line from the slave cylinder connector.
  17. Remove the transmission crossmember support. Refer to Transmission Rear Mount Replacement .
  18. Support the transmission with a transmission jack.
  19. Slowly lower the transmission to access the transmission bolts.

    20. Important: Leave the 2 clutch housing to engine block retaining bolts located at the 10 and 2 o'clock positions tight at this time.

  20. Remove the 6 remaining transmission retaining bolts.
  21. Remove the 2 remaining transmission retaining bolts.

    22. Object Number: 1373941 Size: SH
  22. Pull the transmission rearward to just clear the locating dowels, then rotate the transmission 90 degrees to the right to gain clearance from the vehicle floor pan.
  23. When the transmission input shaft clears the clutch pressure plate, lower the transmission from the vehicle.

Installation Procedure
  1. Place the transmission in the 3rd gear position.
  2. With the transmission positioned 90 degrees to the right side, position the transmission in the vehicle up to the locating dowels on the engine.
  3. Slowly raise the transmission until in place.

    4. Object Number: 210528 Size: SH
  4. Install the transmission (1) to the vehicle, then rotate the transmission to the upright position.
  5. Install the transmission bolts (2).

    6. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1373943 Size: SH
  6. Tighten the transmission retaining bolts .

    7. Tighten
    Tighten the transmission bolts to 50 N·m (37 lb ft).

  7. Install the transmission crossmember support. Refer to Transmission Rear Mount Replacement .
  8. Remove the transmission jack from the transmission.

    9. Object Number: 1373933 Size: SH
  9. Install the right transmission close-out cover and bolt (1).

    10. Object Number: 1373934 Size: SH
  10. Install the left transmission close-out cover (1).
  11. Connect the clutch actuator cylinder pipe to the clutch master cylinder hose.

    12. Object Number: 1373937 Size: SH
  12. Push together the clutch hydraulic hose fittings, then install the retaining clip (1).
  13. Check the clutch hydraulic hoses for kinks or twists.
  14. Remove the engine safety stands.

    15. Object Number: 477355 Size: SH
  15. Install the wiring harness bracket and push in retainer (4).
  16. Connect the following electrical connectors:
    17. • Vehicle speed sensor (3)
    • Reverse lockout solenoid (2)
    • Skip shift solenoid (1)

    Object Number: 477352 Size: SH
  17. Connect the backup lamp switch electrical connector (2).
  18. Install the clip (1) to the transmission.
  19. Install the starter motor. Refer to Starter Motor Replacement .
  20. Install the catalytic converters. Refer to Catalytic Converter Replacement .
  21. Install the propeller shaft. Refer to Two-Piece Propeller Shaft Replacement .
  22. Remove the rear axle safety stands.
  23. Install the transmission oil drain plug.

    24. Tighten
    Tighten the transmission oil drain plug to 28 N·m (21 lb ft).

  24. Refill the transmission with fluid. Refer to Transmission Fluid Replacement .
  25. Bleed the clutch hydraulic system. Refer to Hydraulic Clutch Bleeding .
  26. Lower the vehicle.
  27. Install the transmission shift control assembly. Refer to Shift Control Assembly Replacement .