The clutch assembly is made up of a number of wearable components. The flywheel is bolted to the crankshaft assembly to transfer power from the engine too the clutch disc. The clutch disc holds the flywheel and pressure plate together without slipping. The pressure plate applies the needed pressure to prevent slipping and is splined to the main transmission shaft. The pilot bearing is pressed into the flywheel or crankshaft to support the main transmission shaft. The release bearing (or throw out bearing) rides on the center of the pressure plate and is used to apply pressure to the pressure plate when spinning so the vehicle can stop without the engine stopping. If you think you have a clutch problem, have one of our A.S.E. Certified Technicians check out before condemning it to prevent unneeded costly repairs.