Automatic transmission meaning

Automatic transmission definition

A mechanism of the drivetrain which takes the power from the engine and transfers it to the driveshaft or wheels. Without using a clutch , it uses a torque converter and fluid coupler to change the gear ratio. It automatically effects gear changes to meet varying road and load conditions. Gear changing is done through a series of oil operated clutches and bands .

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Automotive terms beginning with "A", page 24

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