Differential gear, in auto mechanics, gear arrangement that allows power from the engine to be transmitted to a couple of generating wheels, dividing the force equally between them but permitting them to follow paths of different lengths, as when turning a corner or traversing an uneven road. On a straight road the tires rotate at the same speed; when turning a corner the outside wheel has farther to proceed and can turn faster compared to the inner wheel if unrestrained.

The components of the Ever-Power differential are proven in the Figure. The energy from the transmission is sent to the bevel band equipment by the drive-shaft pinion, both which are kept in bearings in the rear-axle housing. The case can be an open boxlike structure that is bolted to the band gear possesses bearings to support a couple of pairs of diametrically opposite differential bevel pinions. Each wheel axle is attached to a differential side gear, which meshes with the differential pinions. On a straight road the wheels and the medial side gears rotate at the same speed, there is absolutely no relative motion between your differential aspect gears and pinions, and they all rotate as a unit with the case and ring gear. If the vehicle turns left, the right-hand steering wheel will be required to rotate faster compared to the left-hand wheel, and the side gears and the pinions will rotate in accordance with one another. The ring gear rotates at a acceleration that is add up to the mean speed of the remaining and right wheels. If the tires are jacked up with the tranny in neutral and among the tires is turned, the opposite wheel will submit the opposite direction at the same speed.

The torque (turning minute) transmitted to both wheels with the Ever-Power differential may be the same. Consequently, if one steering wheel slips, as in ice or mud, the torque to the other wheel is decreased. This disadvantage can be overcome somewhat by the utilization of a limited-slide differential. In one edition a clutch connects among the axles and the ring gear. When one wheel coupling China encounters low traction, its inclination to spin can be resisted by the clutch, therefore providing greater torque for the additional wheel.
A differential in its most elementary form comprises two halves of an axle with a gear on each end, linked collectively by a third gear creating three sides of a square. This is usually supplemented by a fourth gear for added strength, completing the square.