A gearbox is a complex mechanical gadget that enables cars to operate at varying speeds on the road while maintaining an acceptable revolution range of the engine. The majority of the performance cars are fitted with some switches that are located behind the steering wheel and popularly known as sequential gearboxes; however, they are either electronic manual controls or standard automatic controls and do not operate on real sequential mechanism.
There are various transmission mechanisms that can be fitted in cars such as the automatic transmission with manual control, true sequential gearboxes and direct shift gearboxes. The idea behind the design of the direct shift gearboxes is to provide swift changes in gear with the longevity of an automatic gearbox. Basically, a direct shift gearbox is a manual gearbox that is controlled by a computer, and has two clutches each of which engages different selected gears.
True sequential gears are often found in racing cars and not in ordinary cars because they need regular maintenance and are very expensive. Sequential gearboxes have two main advantages which include the capability to swiftly change gears in the absence of a clutch and improved accuracy. The setup of this gearbox is such that to change down, the lever has to be pushed forward, and to change up, the lever has to be pulled backwards.