Clutch: Testing and Inspection

Preliminary Checking Procedure
Preliminary Checks
Identify the problem and the probable cause before attempting to repair the following components for any reason other than obvious failure:
^ The clutch
^ The transmission assembly
^ Related hydraulic components
A large percentage of clutch and manual transmission problems include the following conditions:
^ High-shift effort
^ Gear clash
^ Grinding
Carefully analyze the problems with the aid of the diagnostic tables.
Before removing what you suspect to be a failed hydraulic clutch system, check the reservoir fluid level with the actuator cylinder in place. Fill the reservoir to the specified level with GM Delco Supreme No. 110 Brake Fluid (GM P/N 1052535), or equivalent fluid, that meets the DOT 3 specifications. Do not overfill the system.
If the reservoir requires any fluid, check the hydraulic system components for leakage. Remove the rubber boots from the cylinders, checking for leakage past the pistons. A slight wetting of the surfaces is acceptable. Excessive leakage requires replacement of the system.

Clutch Spin Down Time
Check the clutch spin down time as follows:
1. Apply the parking brake. Block the vehicle wheels.
2. Shift the transmission into neutral.
3. Start the engine. Run the engine at idle speed.
4. Engage the clutch.
5. Disengage the clutch. Wait 9 seconds.
6. Shift the transmission into reverse.
7. If you hear a grinding noise, refer to Release Bearing Noisy with Clutch Engaged.