Final drive serves to connect the driving axle to the engine. This connection is necessary to transmit torque from the engine to the wheels. You should take into account the difference between the east-west and longitudinal mounting of the motor. In case of the east-west mounting the main drive consists of cylindrical gears. When it is a longitudinal mounting, it is made of a drive conical gear. In addition, worm gear and hypoid final drive is used. Ride comfort is possible due to the oblique toothed gear. In addition to those listed above, sometimes the final drive is used for axial displacement.

In order to have enough torque for all driving wheels, it is necessary to ensure increase of torque in the final drive. To do this, change the gear ratio. The number of revolutions per time unit is reduced, while the torque is increased. In this case a constant ratio is applied, which depends on the type of vehicle and in most cases is within 1: 2.5 to 1: 4.