Torque Converter Clutch Pulse Width Modulation Solenoid, Torque Converter Clutch Solenoid, and Wiring Harness. Buick Roadmaster 1996

For 1990-2009 cars

### Removal Procedure

#### Tools Required

J 28458 Power Piston Seal Protector and Diaphragm Retainer Installer

1. Remove the three-way catalytic converter heat shield. Refer to Catalytic Converter Replacement in Engine Exhaust.
2. Remove the oil pan and the oil filter. Refer to Automatic Transmission Fluid and Filter Replacement .
3. Remove the external wiring harness connector from the transmission pass-through connector.

Squeeze the fore and aft flats on the connector in order to release the locking tabs. Pull the connector.

4. Remove the accumulator cover bolts.
5. Remove the 1-2 accumulator cover.
6. Remove the piston.
7. Remove the springs.
8. Remove the component electrical connectors.
9. Remove the TCC PWM solenoid retainer.
10. Remove the TCC PWM solenoid from the control valve body.
11. Remove the pressure control solenoid retainer bolt/screw.
12. Remove the pressure control solenoid retainer.
13. Remove the pressure control solenoid.
14. Remove the TCC solenoid valve bolts.
15. Use the J 28458 in order to remove the pass-through electrical connector from the transmission case.

Place the small end of the J 28458 over the top of the connector.

Twist the J 28458 in order to release the four tabs while pulling the harness connector from the transmission case.

16. Remove the TCC solenoid valve with the wiring harness from the transmission case.

### Installation Procedure

1. Install the TCC solenoid with the wiring harness to the transmission case.
2. Install the pass-through electrical connector to the transmission case.
3. Install the TCC solenoid bolts and screws.
4. Install the pressure control solenoid.
5. Install the pressure control solenoid retainer.
6. Install the pressure control solenoid retainer bolt and screw.

Tighten

• | Tighten the TCC solenoid bolts/screws to 11 N·m (97 lb in).

• | Tighten the pressure control solenoid bolt/screw to 11 N·m (97 lb in).

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.

7. Install the TCC PWM solenoid to the control valve body.
8. Install the TCC PWM solenoid retainer.

Important: The piston legs must face toward the case when installed.

9. Connect the component electrical connectors.
10. Install the 1-2 accumulator piston to the accumulator cover.
11. Install the 1-2 accumulator springs onto the piston.
12. Install the 1-2 accumulator cover.
13. Install the 1-2 accumulator cover bolts.

Tighten
Tighten the bolts to 11 N·m (97 lb in).

14. Install the wiring harness connector to the transmission pass-through connector.
15. Install the oil pan and the oil filter. Refer to Automatic Transmission Fluid and Filter Replacement .
16. Install the converter heat shield. Refer to Catalytic Converter Replacement in Engine Exhaust.