Automatic transmission
Videos
An automatic transmission or automatic gearbox is a multi-speed transmission used in motor vehicles that does not require any input from the driver other than throttle position to change forward gears
Cutaway view of a 2007 Toyota AA80E hydraulic automatic
Gear selector of a 1992 Ford Escort with automatic transmission
Cutaway view of a ZF 8HP transmission: torque converter on the left, planetary gearsets in the centre, control mechanisms at the bottom
Torque converter – cutaway view
A transmission 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 or reduction, in a machine.
Automatic transmission
…An automatic transmission (AT) or automatic gearbox is a multi-speed transmission used in motor vehicles that does not require any input from the driver other than throttle position to change forward gears under normal driving…
Transmission internals for a 2009 Volkswagen Golf
Transmission for a Bristol Sycamore helicopter
16-speed tractor transmission (plus 8 reverse gears)
Mazda M5OD manual transmission (viewed from the engine side)