GM Service Manual Online
For 1990-2009 cars only

Cause

Action

DEFINITION: The clutch does not disengage completely to allow smooth shift operations. It may cause gear clashing while the vehicle is not moving, at idle, and shifting out of NEUTRAL, or hard shifting in and out of gears while driving the vehicle.

Review the Symptoms - Clutch and perform the necessary inspections.

Pedal blocked from full travel

  1. Inspect for obstacles that prevent the pedal from going to the floor.
  2. Clear any obstacles from under the pedal area, such as floor mats or interior panels.
  3. Clear any obstacles from pedal bracket area, such as wiring or sound deadener.

Excessive travel between pedal and clutch master cylinder

  1. Inspect the pedal for worn bushings.
  2. Replace the pedal bushings, if worn. Refer to Clutch Pedal Replacement .
  3. Inspect the clutch master cylinder push rod.
  4. Replace the clutch master cylinder push rod head, if loose.

Clutch pedal mounting loose

  1. Inspect the clutch pedal mounting bracket for loose or missing fasteners.
  2. Replace or repair the fasteners. Refer to Clutch Pedal Replacement .

Linkage at pedal worn or damaged

  1. Inspect the linkage at the pedal for excessive wear.
  2. Repair or replace the linkage, as required. Refer to Clutch Pedal Replacement .

Clutch master cylinder seized or binding

  1. Inspect the master cylinder for being able to move freely and full range of travel.
  2. Replace the clutch master cylinder, as required. Refer to Clutch Master Cylinder Replacement .

Air in the clutch hydraulic system

Bleed the clutch hydraulic system. Refer to Hydraulic Clutch Bleeding .

Clutch actuator cylinder seized or binding

  1. Inspect the clutch actuator for moving freely.
  2. Replace the clutch actuator cylinder, if binding. Refer to Clutch Actuator Cylinder Replacement .

Clutch master cylinder leaking internally

  1. Inspect for proper pedal reserve.
  2. 1.1. Let up halfway on pedal.
    1.2. Apply the pedal a few times.
    1.3. Inspect to ensure there is still the proper pedal reserve.
  3. Replace the clutch master cylinder if it will not hold pedal reserve. Refer to Clutch Master Cylinder Replacement .

Damaged clutch assembly components

  1. Remove the clutch assembly.
  2. Inspect the following clutch assembly components for damage:
  3. • Damaged clutch disc hub splines
    • Bent clutch disc
    • Bent drive straps
    • Broken or warped pressure plate
  4. Replace the clutch assembly if any of the above damage is found. Refer to Clutch Pressure and Driven Plate Replacement .

Excessive side loading on the clutch actuator cylinder

  1. Inspect the following clutch system components:
  2. • Excessive flywheel runout
    • Excessive engine to transmission misalignment
    • Clutch actuator cylinder to transaxle misalignment
  3. Repair or replace any faulty components.

Transaxle input shaft splines worn or damaged

Replace the transmission input shaft. Refer to Transmission Case Disassemble .

Tight or contaminated clutch disc splines

  1. Clean the clutch disc and input shaft splines.
  2. If the clutch disc will not clean, replace the clutch assembly. Refer to Clutch Pressure and Driven Plate Replacement .

Flywheel housing, engine block to clutch housing, or transaxle front case excessively misaligned

  1. Inspect the clutch housing or the transmission front case for being faulty.
  2. Replace the clutch housing if it is faulty. Refer to Transmission Replacement .
  3. Replace the transmission front case half. Refer to Transmission Case Disassemble .

Grease or oil contamination on the clutch discs facing

  1. Repair the oil leak.
  2. Repair the grease leak.
  3. Clean the clutch disc facing and the other clutch assembly components.
  4. Replace the clutch assembly if it will not clean. Refer to Clutch Pressure and Driven Plate Replacement .

Clutch master cylinder mounting loose

  1. Inspect the clutch master cylinder mounting.
  2. Replace the nut and tighten the fastener, if present.
  3. Inspect the twist lock feature on the clutch master cylinder.
  4. If no damage is found to the twist lock feature, remove the clutch master cylinder and install again.
  5. If damage is found to the twist lock feature, replace the clutch master cylinder.