SERVICE MANUAL UPDATE HYDRAULIC CLUTCH SYSTEM

CLUTCH HYDRAULIC SYSTEM/MANUAL TRANSAXLE SERVICE PROCEDURES

MODELS AFFECTED 1988 GRAND PRIX EQUIPPED WITH --------------- HM 282 MANUAL TRANSAXLES SERVICE MANUAL UPDATE

The 1988 Grand Prix models with manual transaxles use a one-piece hydraulic line for clutch operation. Whenever powertrain components are lowered for any reason (removal, access to other components, etc.),the clutch actuator must be removed from the clutch housing using the attached procedures. Also, the clutch hydraulic system cannot be bled. If a component fails, the entire system (master cylinder, hydraulic line and clutch actuator) must be replaced as an assembly.

CLUTCH ACTUATOR REMOVAL FOR POWERTRAIN ACCESS

Remove or Disconnect

1. Negative battery cable. 2. Instrument panel sound insulator. 3. Clutch master cylinder pushrod from clutch pedal. 4. Two actuator retaining nuts. 5. Actuator from transaxle housing.

Install or Connect

1. Actuator to transaxle housing. 2. Actuator retaining nuts.

Tighten

o Two retaining nuts gradually and alternately to avoid damage to actuator flange. o Torque to 25 N-m (18 lb. ft.).

3. New bushing in clutch master cylinder push rod. Lubricate bushing before installation.

4. Clutch master cylinder pushrod to clutch pedal, with bushing tangs snapped into pedal pin groove.

5. Press pedal down several times to assure that effort is normal.

6. Readjust cruise control, if required. Refer to CRUISE CONTROL (SECTION 9B) in Service Manual.

7. Sound insulator.

8. Negative battery cable.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.