The clutch would have to be one of the most abused components in a car. Some get dumped at 6000 revs, others might have to handle the torque of a blown 7.0-litre V8. But the cruellest of all is the little old lady who's so deaf she can't hear the the engine revving its head off up the hill as she uses the clutch pedal as a footrest.
We all know what a clutch does (it allows the engine power to be gradually applied to the gearbox, and disengaged to permit smooth gear changes), now its time to learn how it does it.

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