The transmission is an integral part of a motor vehicle which belongs to the power transmission system and is located directly behind the engine or coupling. Without a gearbox, the vehicle could not move at different speeds, could not be put in motion, nor moved back and maneuvered with it. The gearbox transforms the motor engine's performance and transmits greater or lesser force to the wheels, depending on the driving resistance. With this work, we will know what the gearbox is, its role and task, the basic concepts of gearboxes and gear types.