Manual transmission

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A manual transmission (MT), also known as a manual gearbox is a multi-speed motor vehicle transmission system in which the driver manually selects the gear ratio, typically using a gear stick and clutch. In automobiles, the clutch is typically operated by a foot pedal; motorcycles typically use a hand lever. Manual transmissions have historically used sliding-mesh and constant-mesh designs. Most modern manual transmissions use constant-mesh gears with synchromesh mechanisms to facilitate gear changes. They commonly provide four to seven forward gear ratios, depending on the vehicle and application. Manual transmissions are distinguished from automatic transmission, which selects gears without direct driver operation of the transmission. Automated manual transmissions and dual-clutch transmissions use related mechanical principles but automate some or all of the gear-changing process.

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