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 street the wheels rotate at the same swiftness; when turning a corner the outside wheel has 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 which are kept in bearings in the rear-axle housing. The case is an open boxlike structure that’s coupling China 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 gear, which meshes with the differential pinions. On a directly road the tires and the side gears rotate at the same swiftness, there is absolutely no relative motion between the 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 forced to rotate faster compared to the left-hand steering wheel, and the medial side gears and the pinions will rotate in accordance with each other. The ring gear rotates at a acceleration that is add up to the mean swiftness of the left and right wheels. If the wheels are jacked up with the transmitting in neutral and one of the wheels is turned, the opposite wheel will turn in the opposite path at the same quickness.

The torque (turning moment) transmitted to the two wheels with the Ever-Power differential is the same. Therefore, if one wheel slips, as in ice or mud, the torque to the other wheel is decreased. This disadvantage can be overcome somewhat by the use of a limited-slip differential. In one edition a clutch connects among the axles and the band gear. When one steering wheel encounters low traction, its tendency to spin is usually resisted by the clutch, therefore providing greater torque for the other wheel.
OPEN DIFFERENTIAL:
A differential in its most basic form comprises two halves of an axle with a equipment on each end, linked collectively by a third equipment making up three sides of a square. This is usually supplemented by a 4th gear for added strength, completing the square.