This document discusses the purpose and operation of a conventional differential. It describes how a conventional differential divides engine torque between the drive wheels so they can rotate at varying speeds, such as when turning. The key components are the bevel drive pinion, differential case, side gears attached to the axle shafts, and differential pinions. When turning, the differential allows the outer wheel to rotate faster than the inner wheel to accommodate the different speeds needed. The document also briefly mentions no-spin differentials, which use clutches between the driving axles to improve traction when one wheel tends to slip.