Differential gear, in auto mechanics, gear arrangement that permits 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 street. On a straight road the tires rotate at the same quickness; when turning a part the outside wheel offers farther to proceed and can turn faster compared to the inner wheel if unrestrained.

The components of the Ever-Power differential are demonstrated in the Figure. The energy from the transmission is delivered to the bevel band equipment by the drive-shaft pinion, both which are held in bearings in the rear-axle housing. The case can be an open boxlike framework that is bolted to the band gear possesses bearings to support one or two pairs of diametrically opposing 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 side gears rotate at the same velocity, there is no relative motion between your differential side gears and pinions, and they all rotate as a device with the case and ring gear. If the vehicle turns to the left, the right-hand steering wheel will be forced to rotate faster compared to the left-hand steering wheel, and the medial side gears and the pinions will rotate relative to each other. The ring equipment rotates at a velocity that is add up to the mean swiftness of the remaining and right wheels. If the wheels are jacked up with the transmission in neutral and among the tires is turned, the opposite wheel will submit the opposite direction at the same acceleration.

The torque (turning instant) transmitted to both wheels with the Ever-Power differential is the same. Consequently, 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 utilization of a limited-slip differential. In one edition a clutch connects among the axles and the ring gear. When one wheel encounters low traction, its tendency to spin can be resisted by the clutch, thus providing better torque for the additional wheel.
OPEN DIFFERENTIAL:
A differential in its most Differential Gear elementary form comprises two halves of an axle with a gear on each end, connected collectively by a third equipment creating three sides of a square. This is usually supplemented by a fourth gear for added strength, completing the square.