Control Valve Assembly. Buick Roadmaster 1996

For 1990-2009 cars

### Removal Procedure

1. Remove the oil pan and filter. Refer to Automatic Transmission Fluid and Filter Replacement .
2. Disconnect the electrical connectors from the control valve body components.
3. Remove the TCC PWM solenoid retainer and solenoid.
4. Remove the Torque Converter Clutch (TCC) solenoid bolts and solenoid with the O-ring seal and wiring harness. Lay the wiring harness aside.
5. Remove the pressure switch bolts and pressure switch.
6. Remove the manual detent spring bolt and spring.
7. Remove the remaining control valve body bolts.
8. Remove the manual valve link.
9. Remove the control valve.
10. Remove the check balls (2, 3, 4, 5, 6, 8, and 12) from the control valve.
11. Clean the control valve components.
12. Inspect the control valve. Refer to Control Valve Body and Pressure Switch for disassembly, cleaning, inspection and repair of the control valve body.

### Installation Procedure

Notice: Tighten the control valve assembly bolts in a spiral pattern starting from the center. If the bolts are tightened in a random pattern, the valve bores may become distorted, which can inhibit valve operation.

1. Install the check balls (2, 3, 4, 5, 6, 8, and 12) to the control valve.

Important: Do not damage the solenoid filter screens when installing the control valve.

2. Install the control valve and manual valve link to the transmission case.
3. Install the control valve body bolts.
4. Install the manual detent spring and bolt. Do not tighten the bolt at this time.
5. Install the pressure switch and bolts.
6. Install the TCC solenoid with the O-ring and wiring harness and bolts.

Tighten
Tighten the bolts 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 and retainer to the control valve.
8. Connect the electrical connectors to the control valve body components.

Tighten

• | Tighten the control valve body bolts in a spiral pattern to 11 N·m (97 lb in).

• | Tighten the pressure switch bolts to 11 N·m (97 lb in).

• | Tighten the manual detent spring bolt to 24 N·m (18 lb ft).

9. Install the oil filter and oil pan. Refer to Automatic Transmission Fluid and Filter Replacement .