1-Flywheel not machined. Grinder it with a Flywheel Grinder Machine. (not with a lathe). 2-Oil on facings. 3-Clutch linkage balky. 4-Worn facings. 5-Warped pressure plate. 6-Engine out of tune. 7-Release bearing off center. 8-Cover,lever or diaphragm spring bent during instalation. 9-Disc bent. 10-Crankshaft is not aligned with the transmission shaft. If you want to know if our Performance Kit is right for your car, you need to Know the torque of your vehicle. Click on the "HP vs Torque button at the left side bars to see the formula to calculate it. Kit`s torque capacity is shown after each kit number. Torque in ft lbs Quality Clutches at Warehouse Prices. New, never Rebuilt info@capclutch.com