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Manual Transmissions were the first transmission used in cars all over the globe. They were used from commercial cars to family cars, up until 1939 when the automatic transmissions were introduced.
Floor-mounted shifter- In most vehicles with manual transmission, gears are selected by manipulating a lever called a gear stick, shift stick, gearshift, gear lever, gear selector, or shifter connected to the transmission via linkage or cables and mounted on the floor, dashboard, or steering column. Moving the lever forward, backward, left, and right into specific positions selects particular gears.
Column-mounted shifter-mounted on the steering column of the car. If a U.S. vehicle was equipped with overdrive, it was very likely to be a Borg-Warner type, operated by briefly backing off the gas when above 28 mph to enable, and momentarily flooring the gas pedal to return to normal gear. The control simply disables overdrive for such situations as parking on a hill or preventing unwanted shifting into overdrive.[
The manual Transmission, otherwise know as the "stick shift" or "standard transmission", was the first type of transmissions available in vehicles. A manual transmission relies on the driver to disengage, change, and reengage the transmission.
The first automatic transmission were developed by General Motors During the 1930s and introduced in the 1940 Oldsmobile as the "Hydra-Matic" transmission. They were incorporated into GM-built tanks during WW-II and, after the war, GM marketed them as beign "battle tested".
An automatic(also called automatic gear box, or automatic transmission)is one type of motor vehicle transmission that can automatically change gear ratios as the vehicle moves, freeing the driver from having to shift gears manually.
The are two major differences in automatic transmissions that aren't in manual transmissions:
-There is no clutch pedal
-there is no gear shift
Once you put the transmission into drive, everything else is automatic.