Most vehicles sold in the United States since the 1950s have had automatic transmissions. The vehicle’s gearbox is able to change the gear ratios automatically as the vehicle moves.
This then allows the driver to be free from having to shift gears manually.
Most automatic transmissions reduce fuel efficiency and the power of the vehicle. In recent years, automatic transmissions have seen significant improvements in terms of fuel efficiency.
There are two basic types of automatic transmission:
A transaxle is also called a transmission — it is a fully automatic front-wheel-drive transaxle with multiple forward gear ranges that include one reverse gear.
Normal automatic transmissions are fully automatic with four forward and one reverse speed. The predominant form of an automatic transmission is hydraulically operated, using:
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