Mechanics

Surges

Automatic Transmission cut-away Image
Automatic Transmission cut-away Image

Step 8 - Check for Standard Transmission Clutch Slippage: When a clutch assembly starts to wear it can cause an engine surge sensation. This is caused by the clutch pressure plate loosing tension and allowing the clutch disc to slip against the flywheel. The clutch assembly is a normal service item and will need to be inspected between 70,000 and 120,000 miles. If the clutch pedal is at the top of its travel with no free-play this is a sign the clutch assembly is worn out and needs replacing. When servicing a clutch disc always replace the clutch disk, pressure plate, throw out and pilot bearings, also have the flywheel surfaced to ensure a good surface for disc contact (Note: some transmissions do not use a pilot bearing). The flywheel is the component the clutch assembly bolts to, the clutch disc is in direct contact with the flywheel and clutch pressure plate.

Clutch and Flywheel Assembly
Clutch and Flywheel Assembly

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35 years in the automotive repair field, ASE Master Technician, Advanced Electrical and Mechanical Theory.


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Article first published (Updated 2013-08-16)