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Automatic transmission

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How Automatic Transmissions Work! (Animation)

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How To Start A Car With An Automatic Transmission (Step-By-Step Tutorial)

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How To Shift Gears In An Automatic Car-Driving Tutorial

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3D Printed Automatic Transmission Model

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LEGO 6-speed+R Automatic Transmission Using Planetary Gear

An automatic transmission, also called auto, self-shifting transmission, n-speed automatic, or AT, is a type of motor vehicle transmission that can automatically change gear ratios as the vehicle moves, freeing the driver from having to shift gears manually. Like other transmission systems on vehicles, it allows an internal combustion engine, best suited to run at a relatively high rotational speed, to provide a range of speed and torque outputs necessary for vehicular travel. The number of forward gear ratios is often expressed for manual transmissions as well.
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