Transmission Replacement. Buick Roadmaster 1996

For 1990-2009 cars

### Removal Procedure

Notice: Automatic transmission oil cooler flushing must be performed when an automatic transmission is removed for service. The flushing procedure should be performed after the removal of the old transmission and before the installation of the overhauled or replacement transmission. Failure to flush the system may cause damage to the system and its components.

#### Tools Required

J 21366 Converter Holding Strap

If the transmission will be removed for repair, refer to section 7A-14A for diagnosis prior to removing the transmission.

1. Disconnect the negative battery cable. Refer to

   Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

   in General Information.
2. Remove the transmission fluid level indicator.
3. Raise the vehicle. Suitably support the vehicle. Refer to General Vehicle Lifting and Jacking in General Information.
4. Remove the propeller shaft. Refer to Propeller Shaft Replacement in Driveline/Axle.

Important: Position the electrical harness away from the transmission in order to prevent damage to the harness or the connectors.

5. Disconnect the electrical connectors from the transmission and the vehicle speed sensor.
6. Disconnect the steering column shift control linkage from the transmission. Refer to Shift Control Linkage Replacement .
7. Remove the transmission converter cover bolts/screws.
8. Remove the transmission converter cover from the transmission.
9. If the transmission converter will be reused, mark the position of the flywheel-to-converter on the converter in order to maintain the original balance during assembly.
10. Remove the flywheel bolts and screws. Discard the flywheel bolts and screws.
11. Use a transmission jack to support the transmission.
12. Loosen the catalytic converter-to-intermediate pipe bolts/screws in order to allow for pivot.
13. Remove the transmission mount nut.
14. Remove the transmission mount washer.
15. Remove the transmission support bolts and screws.
16. Remove the transmission support from the vehicle.
17. Remove the transmission mount bolts and screws.
18. Remove the transmission mount washers.
19. Remove the transmission mount.
20. Remove the transmission mount shims.
21. Remove the catalytic converter support bracket from the transmission. Refer to Converter Braces in Engine Exhaust.
22. Lower the transmission in order to access the oil cooler upper and lower pipes.
23. Remove the fill tube bolt and screw.
24. Place a drain pan under the transmission.
25. Remove the full tube from the transmission.
26. Plug the transmission.
27. Remove the oil cooler upper and lower pipes from the transmission.
28. Plug all of the openings.
29. Support the engine.
30. Remove the transmission bolts and screws.
31. Attach the J 21366 to the transmission in order to retain the transmission converter.
32. Carefully lower the transmission in order to avoid damage to the accelerator control cable, the pipes, or the shift control linkage.
33. Clean the transmission oil cooler. Refer to Transmission Fluid Cooler Flushing .

### Installation Procedure

1. Raise the transmission until the alignment pins on the engine align with the alignment pin holes in the transmission.
2. Remove the J 21366 .
3. Install the transmission bolts/screws.

Tighten
Tighten the transmission bolts/screws to 47 N·m (35 lb ft).

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

4. Remove the engine support.
5. Install the oil cooler upper and lower pipes to the transmission.

Tighten
Tighten the oil cooler upper and lower pipe fittings to 21 N·m (15 lb ft).

6. Install the fill tube to the transmission.
7. Install the tube bolt/screw.

Tighten
Tighten the fill tube bolt/screw to 47 N·m (35 lb ft).

8. Raise the transmission in order to provide clearance for the transmission support member.
9. Install the transmission support member into position.
10. Install the transmission support bolts/screws to 34 N·m (25 lb ft).
11. Install the shims.
12. Install the mount.
13. Install the washers.
14. Install the transmission mount bolts/screws.

Tighten
Tighten the transmission mount bolts/screws to 47 N·m (35 lb ft).

15. Install the transmission mount nut.

Tighten
Tighten the transmission mount nut to 41 N·m (30 lb ft).

16. Install the transmission mount washer.
17. Install the catalytic converter-to-intermediate pipe bolts and screws.

Tighten
Tighten the catalytic converter-to-intermediate pipe bolts/screws to 34 N·m (25 lb ft).

18. Install the transmission jack.
19. Install the new flywheel bolts/screws.

• | Observe the marks made during disassembly and align the bolts/screws in the original position.

• | Make sure that the weld nuts on the torque converter clutch are flush with the flywheel.

• | Test the torque converter clutch for freedom of rotation.

• | Remove the retaining compound from the first three threads of the new flywheel bolts/screws.

• | Finger tighten the three flywheel bolts/screws, then tighten to specification.

Tighten
Tighten the flywheel bolts/screws to 63 N·m (46 lb ft).

20. Install the catalytic converter support bracket. Refer to Catalytic Converter Replacement in Engine Exhaust.
21. Install the transmission converter cover.
22. Install the cover bolts/screws.

Tighten
Tighten the cover bolts/screws to 10 N·m (89 lb in).

23. Install the steering column shift control linkage to the transmission. Refer to Transmission Fluid Cooler Flushing .
24. Install the electrical leads and the retaining clips.
25. Install the propeller shaft. Refer to Propeller Shaft Replacement in Driveline/Axle.
26. Lower the vehicle.
27. Install the transmission fluid level indicator.
28. Connect the negative battery cable.
29. Adjust the shift linkage. Refer to Shift Control Linkage Replacement .
30. Adjust the fluid level.

• | Fill the transmission to the COLD fluid level reading with DEXTRON® III.

• | Check the level of the transmission fluid. Refer to Automatic Transmission Fluid and Filter Replacement .