Diaphragm Spring Fingers OverTraveled-Hitting Clutch Disc
Symptoms:
Clutch slips-does not hold vehicle power
Difficult clutch engagement or disengagement-difficult shifting
Clutch wore out prematurely
Noise from clutch
Possible Causes:
Clutch excessively preloaded-improper adjustment
Improper pressure plate and clutch disc combination
Improper flywheel step/cup dimension
Solutions:
Replace clutch assembly
Inspect and resurface flywheel-replace if necessary
Adjust clutch pedal freeplay

Pressure Plate Bent
Symptoms:
Pressure plate won't bolt evenly to flywheel
Difficult clutch engagement or disengagement-difficult shifting
Clutch chatters
Possible Causes:
Pressure plate dropped
Improper flywheel step/cup dimension
Improper hardware used to fasten pressure plate to flywheel
Debris between pressure plate and flywheel
Solutions:
Replace clutch assembly
Inspect and resurface flywheel-replace if necessary
Use proper hardware-torque bolts to factory specification
Clean surfaces prior to installation

Clutch Disc Hub Springs Loose/Missing
Symptoms:
Noise from clutch
Difficult clutch engagement or disengagement-difficult shifting
Possible Causes:
Clutch disc installed improperly
Transmission misalignment
Abusive upshifting/downshifting
Worn or missing pilot bearing/bushing
Solutions:
Replace clutch disc-install properly
Inspect and resurface flywheel-replace if necessary
Inspect pilot bearing/bushing-replace if necessary
Evaluate driving style-avoid abusive shifting

Clutch Disc Hub Splines Worn Excessively/Hub Spring Pack Cracked
Symptoms:
Noise from clutch
Difficult clutch engagement or disengagement-difficult shifting
Rapid pilot bearing/bushing wear
Possible Causes:
Transmission/bellhousing misalignment
Transmission hung on clutch disc by input shaft during installation
Worn or missing pilot bearing/bushing
Solutions:
Check transmission and bellhousing alignment
Inspect input shaft for wear
Replace clutch disc
Replace pilot bearing/bushing
Support transmission when installing