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Just like that of a manual transmission, the automatic transmission’s primary job is to allow the engine to operate in its narrow range of speeds while providing a wide range of output speeds.
However, it achieves its ratio changes in a completely different much more complex way. On all modern vehicles the “ratio change” or “shift” is made by a mini computer or “ECU” rather than by the driver of the vehicle. (padel shifts excluded).
Whats happening inside the gearbox is totally different from a manual transmission. The key difference between a manual and an automatic transmission is that the manual transmission locks and unlocks different sets of gears to the output shaft to achieve the various gear ratios, while in an automatic transmission, the same set of gears produces all of the different gear ratios. The planetary gearset is the device that makes this possible in an automatic transmission.
This Planetary gearset is an ingenious piece of engineering, and everything else inside the gearbox is there to help it do it’s thing.
If this simple explination has piqued your interest then you can find out more at; http://auto.howstuffworks.com/automatic-transmission.htm
Why use our automatic gearboxes?
Our reconditioned Automatic gearboxes are supplied complete with a re-manufactured Torque Converter which carries a lifetime warranty. As with our manual gearboxes, our automatic gearboxes are built to the highest industry standard by our trained technicians.
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