Brake Graunch

The name given to the noise made by the brakes when they are just slipping when starting (or stopping) from rest. The brake graunch is mainly exhibited on the vehicles fitted with automatic transmission, but can also occur on manual vehicles e.g., on a steep hill. It is caused by brake pad stick-slip when static and dynamic friction is very similar. The term 'creep/groan' is also used to describe the brake graunch.

See also: Brake Judder, Brake Squeal, Brakes.

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Subjects: Automotive Mechanical Engineering Noise & Vibration