11 Facts About Automatic transmission

An automatic transmission is a multi-speed transmission used in internal combustion engine-based motor vehicles that does not require any input from the driver to change forward gears under normal driving conditions.

The first mass-produced automatic transmission is the General Motors Hydramatic four-speed hydraulic automatic, which was introduced in 1939.

Hydraulic automatic transmission uses planetary gearsets instead of the manual transmission's design of gears lined up along input, output and intermediate shafts.

Valve body inside the Automatic transmission is responsible for directing hydraulic pressure to the appropriate bands and clutches.

However, the Automatic transmission was prone to sudden failure, due to the Automatic transmission being unable to withstand forces from the abrupt gear changes.

Related searches

An early patent for the automatic transmission was granted to Canadian inventor Alfred Horner Munro of Regina in 1923.

The transmission was sensitive to engine throttle position and road speed, producing fully automatic up- and down-shifting that varied according to operating conditions.

Electronics began to be more commonly used to control the Automatic transmission, replacing mechanical control methods such as spring-loaded valves in the valve body.

Dual-clutch Automatic transmission uses two separate clutches for odd and even gear sets.

An early example of this Automatic transmission was introduced with the Hudson Commodore in 1942, called Drive-Master.

Consequently, in some jurisdictions, drivers who have passed their driving test in a vehicle with an automatic transmission are restricted from driving cars with manual transmissions.