Clutch Disc Friction Material Cracked/Broken/Missing
Symptoms:
Clutch slips-does not hold vehicle power
Difficult clutch engagement or disengagement-difficult shifting
Noise from clutch
Possible Causes:
Abusive downshifting/upshifting
Side-step launch of vehicle
Improper break-in procedure
Missed shifts
Solutions:
Replace clutch with upgraded clutch assembly
Inspect and resurface flywheel-replace if necessary
Follow proper break-in procedure
Evaluate driving style-avoid abusive shifting and launching

Clutch Disc Hitting Flywheel or Flywheel Bolts
Symptoms:
Difficult clutch engagement or disengagement-difficult shifting
Noise from clutch
Hub spring(s) loose in clutch disc
Difficulty adjusting clutch pedal freeplay
Possible Causes:
Clutch disc installed backwards
Flywheel bolts improper-head of bolt too large
Flywheel worn-improper resurfacing or too thin
Solutions:
Replace clutch disc
Inspect pressure plate-replace if wear is found
Inspect flywheel crankshaft bolts-replace if wear is found or head is too large
Inspect flywheel-replace if improperly dimensioned

Throwout Bearing Installed Backward
Symptoms:
Noise from throwout bearing
Hard and/or pulsating clutch pedal
Difficult clutch engagement or disengagement-difficult shifting
Possible Causes:
Bearing installed incorrectly
Solutions:
Replace throwout bearing-install correctly
Inspect pressure plate-replace if wear is found
Inspect transmission guide tube and bearing collar for wear-repair or replace if necessary

Clutch Assembly Glazed
Symptoms:
Clutch slips-does not hold vehicle power
Clutch wore out prematurely
Possible Causes:
Improper break-in procedure
Clutch excessively preloaded-improper adjustment
Excessive slipping from driving style
Oil leak from engine or transmission
Solutions:
Repair oil leak-if necessary
Thoroughly clean bellhousing and release componentsReplace clutch assembly
Inspect and resurface flywheel-replace if necessary
Adjust clutch pedal freeplay
Follow proper break-in procedure
Evaluate driving style