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Transmission (mechanical device)
Drivetrain transmitting propulsion power / From Wikipedia, the free encyclopedia
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For other uses of the word "transmission", see Transmission.
"Gearbox" redirects here. For other uses, see Gearbox (disambiguation).
A transmission (also called a gearbox) is a mechanical device which uses a gear set—two or more gears working together—to change the speed, direction of rotation, or torque multiplication/reduction in a machine.[1][2] Transmissions can have a single fixed-gear ratio, multiple distinct gear ratios, or continuously variable ratios.
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