The differential is responsible for transferring engine power to the wheels. It also compensates for and adjusts to the differences in wheel speed as your vehicle moves through turns. When your vehicle navigates a turn, the inside wheel turns slower than the outside wheel, which has to turn faster in order to keep pace with the inside wheel. The differential allows the wheels to turn at different speeds while maintaining control. A vehicle without a differential would hop and bump along the pavement for an unstable, shaky ride. Four wheel drive vehicles are equipped with a differential in front and back, while rear wheel drive vehicles are equipped with a differential in back. A front wheel drive’s differential, called the transaxle because of the functional combination of the front axle and transmission, is located between the front wheels. All-wheel drive vehicles are equipped with a differential between both the front and rear wheels with a transfer case between them. The case adjusts for speed differences between the front and rear wheels. In all vehicle applications, the differential is primarily responsible for routing and regulating power between wheels.