You have probably noticed that when we walk in all four wheel drive vehicles, the inside wheels travel less than the outer wheel, because these vehicles are equipped with a mechanism called differential. This difference in mechanism reduces the speed of the inner wheel and outer wheel increases, if the vehicle does not skid and facilitate easy rotation. When the vehicle is in motion as the difference skips both wheels at the same speed. Differences have one or the other mechanism of torque to accomplish this task, and torque requirements vary for different types of driving conditions constituency Street, Rock Crawling, dirt racing, driving on ice circular track racing, drag racing, etc.