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 check out paths of different lengths, as when turning a corner or traversing an uneven road. On a straight street the tires rotate at the same swiftness; when turning a part the outside wheel provides farther to proceed and can turn faster than the inner steering wheel if unrestrained.

The elements of the Ever-Power differential are proven in the Figure. The energy from the transmitting is sent to the bevel band equipment by the drive-shaft pinion, both of which are kept in bearings in the rear-axle housing. The case can be an open boxlike Differential Gear structure that’s bolted to the band gear possesses bearings to support a couple of pairs of diametrically opposite differential bevel pinions. Each steering wheel axle is attached to a differential side equipment, which meshes with the differential pinions. On a directly road the tires and the side gears rotate at the same quickness, there is absolutely no relative motion between your differential side gears and pinions, plus they all rotate as a device with the case and band gear. If the vehicle turns left, the right-hand wheel will be required to rotate faster compared to the left-hand wheel, and the medial side gears and the pinions will rotate relative to each other. The ring gear rotates at a swiftness that is add up to the mean acceleration of the left and correct wheels. If the wheels are jacked up with the transmitting in neutral and one of the wheels is turned, the opposite wheel will submit the opposite path at the same quickness.

The torque (turning second) transmitted to the two 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 reduced. This disadvantage could be overcome relatively by the use of a limited-slip differential. In one version a clutch connects one of the axles and the ring gear. When one wheel encounters low traction, its inclination to spin is certainly resisted by the clutch, hence providing higher torque for the other wheel.
A differential in its most elementary form comprises two halves of an axle with a gear on each end, connected together by a third gear creating three sides of a square. This is normally supplemented by a fourth gear for added strength, completing the square.