Clutch Judder Definition: Clutch judder is caused by the clutch components and the flywheel not meeting concentrically or mating properly. This generally happens after the vehicle has come to a complete stop and then engaging the clutch during take-off. The physical juddering is the clutch irregularly gripping and slipping as the pedal is let out.
Potential causes of clutch judder related to installation/modification:
- Clutch linkage is worn or damaged
- Improperly tuned engine
- Improper gear ratio for the tire diameter
- Excessive driveline angle
- Excessive backlash in the differential
- Worn or damaged engine mounts or transmission mounts
- Worn or misaligned u-joints in the driveshaft
- Damaged or excessively worn CV joints
- Bad leaf springs, bushings, or mounts
Potential causes of clutch judder related to the operation,
- Improper break-in procedure resulting in the disc becoming deformed
- Clutch disc friction material contaminated during install
- The clutch disc is bent
- Flywheel has an incorrect step
- Flywheel friction surface is not parallel with the crank flange surface
- Flywheel was not properly resurfaced before the new clutch installed
- Flywheel has an improper surface finish
- Flywheel has severe hard spots or hot spots
- Pressure plate or clutch disc is defective
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