To check for clutch chatter, start the engine, depress the clutch completely, and shift the transmission into first gear.Increase engine speed to about 1,500 rpm, then slowly release the clutch pedal and check for chatter as the pedal begins to engage.Do not release the pedal completely, or the vehicle might jump and cause serious injury.As soon as the clutch is partially engaged, depress prevent damage to the clutch parts.