7C-4
CLUTCH
DIAGNOSIS
Condition
Possible Cause
Correction
Slipping
Improper clutch pedal free travel
Worn or oily clutch disc facing
Warped disc, pressure plate or flywheel surface
Weakened diaphragm spring
Rusted clutch cable
Adjust free travel.
Replace disc.
Replace disc, clutch cover or flywheel.
Replace clutch cover.
Replace cable.
Dragging clutch
Improper clutch pedal free travel
Weakened diaphragm spring, or worn spring tip
Rusted input shaft splines
Damaged or worn splines of transmission input
shaft
Excessively wobbly clutch disc
Clutch facings broken or dirty with oil
Adjust free travel.
Replace clutch cover.
Lubricate.
Replace input shaft.
Replace disc.
Replace disc.
Clutch vibration
Glazed (glass-like) clutch facings
Clutch facings dirty with oil
Release bearing slides unsmoothly on input
shaft bearing retainer
Wobbly clutch disc, or poor facing contact
Weakened torsion springs in clutch disc
Clutch disc rivets loose
Distorted pressure plate or flywheel surface
Weakened or loosened engine mounting
bolt or nut
Repair or replace disc.
Replace disc.
Lubricate or replace input shaft
bearing retainer.
Replace disc.
Replace disc.
Replace disc.
Replace clutch cover or flywheel.
Retighten or replace mounting.
Noisy clutch
Worn or broken release bearing
Input shaft front bearing worn down
Excessive rattle of clutch disc hub
Cracked clutch disc
Pressure plate and diaphragm spring rattling
Replace release bearing.
Replace input shaft bearing.
Replace disc.
Replace disc.
Replace clutch cover.
Grabbing clutch
Clutch disc facings soaked with oil
Clutch disc facings excessively worn
Rivet heads showing out of facing
Weakened torsion springs
Replace disc.
Replace disc.
Replace disc.
Replace disc.