What Is The Role of Gearbox?

Why do cars need gearbox, and what are the various gearbox parts used for? Depending on the different driving states, the speed and power of vehicles require to vary within a large range. In order to achieve this, besides of the effective brake, the gear selection is also very important. Therefore, to change the gear ratio to suit the different driving states is a big role of the gearbox. In addition, to achieve the reverse pass and the use of neutral gear cutting off power transmission while the engine keeps running are the reasons that widely used in internal combustion engines.

Advantages and disadvantages of a manual gearbox

The manual models are not as comfortable as the automatic models, it requires the driver to pay more physical strength. While a manual gearbox has stable performance and inexpensive, family cars are needed to regular replace the manual gearbox oil as well as  the clutch.