For 1990-2009 cars

Checks | Causes
--- | ---
DEFINITION: Grabbing (Chattering)
Engine mounts | Loose or worn
Pressure plate |

1. Warped pressure plate surface
2. Burned or smeared resin on pressure plate surface

Clutch disc |

1. Oil contamination
2. Excessively worn, exploded or damaged
3. Worn or broken torsion springs
4. Worn splines in disc hub

Flywheel |

1. Flywheel surface runout.
2. Burned or smeared resin on flywheel surface

Transaxle input shaft | Worn or damaged splines