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What is gearbox?

Transmission mainly refers to the car's transmission.

It into manual, automatic, two manual transmissions consisted mainly of gears and shafts, transmission torque generated by the different gear combinations; automatic transmission AT is composed of hydraulic torque converter, Planetary gears and hydraulic control systems through hydraulic-transmission and gear combinations to achieve variable-speed torque.

Functions: changing the transmission ratio; in the direction of rotation of the engine the same cases, reversed the car could drive; use neutral, interrupt power transmission, so that the engine will start, idle speed, and ease of transmission shift or for the power output.