Worn Friction Material Cause: If the clutch has high mileage, this wear is normal; however, if mileage is low, possible causes include riding the clutch, excessive vehicle loading, defective release system, improper release system adjustment, improperly machined flywheel, clutch components unsuited for the torque of a modified engine.
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	Overheated Pressure Plate Related Symptom: Release problems. Cause: Riding the clutch, defective release system, improper release system adjustment, clutch components unsuited for the torque of a modified engine. The disc would have burnt friction material.
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	Friction Material Contact Related Symptom: Chatter. Cause: Flywheel not resurfaced or resurfaced improperly. The flywheel must have a smooth, flat surface in order for the clutch to actuate properly.
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	Burnt Friction Material Related Symptoms: Chatter, release problems. Cause: Riding the clutch, defective release system, improper release system adjustment, clutch components unsuited for the torque of a modified engine, friction material contamination during installation.
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	Uneven Friction Material Wear Cause: Riding the clutch, defective release system, improper release system adjustment, use of clutch components unsuited for the torque of a modified engine.
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	Pressure Plate Heat Rings Related Symptoms: Chatter Cause: Oil contamination, flywheel not resurfaced or resurfaced improperly, failure to maintain flywheel step/cup dimensions. When resurfacing a stepped or cupped flywheel, be sure to machine the contact surfaces by equal amounts to maintain specified tolerences.
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	Grooves and Heat Marks Related Symptoms: Release problems. Cause: Riding the clutch, defective release system, improper release system adjustment, clutch components unsuited for the torque of a modified engine, improper resurfacing of a step/cup flywheel.
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	Contaminated Friction Material Related Symptoms: Chatter. Cause: Leaking transmission or engine seal, excessive lubrication. Lubricate input shaft splines with a very small amount of high-temperature grease. Slide the disc on the splines to distribute a thin film. Remove the disc and wipe away any excess.
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