Clutch slipping is an automotive term for when the clutch does not fully engage the car's engine and subsequently does not fully transfer power to the wheels. It is the most common sign of a damaged or contaminated clutch that needs to be replaced in vehicles that use a manual transmission.

Function

The clutch in a manual transmission has two major functions. To gradually release engine power to the wheels when a vehicle is starting from a stopped position, and when the vehicle is in motion, the clutch controls engine power when shifting gears to avoid gear crunching.

Diagnosis

Clutch slipping can be diagnosed by a burning smell when operating the vehicle or shifting gears, a slow, lagging acceleration or a vibration in the shift knob that may be accompanied with noises when the clutch is engaged.

Causes

Clutch slipping occurs most often due to a worn or damaged clutch disc. A number of different variables determine the lifespan of a clutch disc, including how aggressive the vehicle is driven, the type of vehicle and the size of engine the clutch is controlling.

Solution

Because clutch slipping is degenerative, only a complete replacement of the clutch kit: the disc, cover, release bearing and the pilot bearing is recommended to solve clutch slippage and most other clutch problems.

Expert Insight

The Clutch Wizard advises that clutch problems are often associated by a leak in the engine or transmission oil contaminating the clutch friction material and to be sure to fix the oil leak before replacing the clutch.

Source:

Edmund's Tech Center

The Clutch Wizard