DEFINITION: Vibration from the clutch components during disengagement or engagement.

Review the Symptoms - Clutch and perform the necessary inspections.

Excessive driveline torsional activity

Review the Vibration Analysis - Driveline in Vibration Diagnosis and Correction.

Clutch incorrectly installed

Remove the clutch and install it correctly. Refer to Clutch Assembly Replacement .

Pilot bearing worn or damaged

1. Replace the pilot bearing. Refer to Clutch Pilot Bearing Replacement .
2. Inspect the input shaft pilot bearing journal for wear or damage.
3. Replace the input shaft if it is damaged or worn. Refer to Transmission Disassemble in Manual Transmission - NV 3500 Unit Repair or Transmission Disassemble in Manual Transmission - NV 4500 Unit Repair or Transmission Disassemble in Manual Transmission - ZF S6-650 Unit Repair.

Transmission input splines worn or damaged

1. Inspect the clutch disc to input splines for wear or damage.
2. Replace the input shaft if the splines are excessively worn. Refer to Transmission Disassemble in Manual Transmission - NV 3500 Unit Repair or Transmission Disassemble in Manual Transmission - NV 4500 Unit Repair or Transmission Disassemble in Manual Transmission - ZF S6-650 Unit Repair.

Clutch disc facings damaged

Replace the clutch assembly. Refer to Clutch Assembly Replacement .

Flywheel housing to clutch housing excessively misaligned

Replace the faulty clutch housing or transmission front case. Refer to Transmission Disassemble in Manual Transmission - NV 3500 Unit Repair or Transmission Replacement in Manual Transmission - NV 4500 or Transmission Disassemble in Manual Transmission - ZF S6-650 Unit Repair.

Clutch out of balance

Replace the clutch assembly. Refer to Clutch Assembly Replacement .