Pinpoint Test B: Clutch Chatter Or Shudder

Manual Transaxle and Clutch







Pinpoint Tests

Pinpoint Test B: Clutch Chatter or Shudder

Normal Operation

Clutch pedal movement is transmitted by fluid pressure to the slave cylinder, which in turn presses the release bearing against the clutch diaphragm spring. This force causes the spring to pull the pressure plate away from the clutch disc.

This pinpoint test is intended to diagnose the following:
- Transaxle mounting
- Clutch pressure plate
- Clutch disc
- Flywheel



PINPOINT TEST B: CLUTCH CHATTER OR SHUDDER

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B1 CHECK THE ENGINE AND TRANSAXLE MOUNTS


- Inspect all engine and transaxle mounts for looseness or damage.
- Are any of the engine or transaxle mounts loose or damaged?

Yes
TIGHTEN or INSTALL new engine mounts or transaxle mounts.

No
GO to B2.

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B2 INSPECT THE CLUTCH PRESSURE PLATE


- Remove the clutch disc.
- Inspect the clutch pressure plate and diaphragm springs for wear and even diaphragm height.
- Are there any signs of wear present on the clutch pressure plate?

Yes
INSTALL a new clutch pressure plate.

No
GO to B3.

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B3 CHECK THE CLUTCH DISC


- Inspect the clutch disc for any signs of damage.
- Is the clutch disc OK?

Yes
INSPECT the flywheel for damage. REFER to Flywheel Runout Check Flywheel Runout Check.

No
INSTALL a new clutch disc.

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