Ashoka Gears offers Spiral Design Automotive Differential Gear. Ashoka Gears is an ISO 9001:9002 registered company. Spiral Design Automotive Differential Gear is an arrangement connecting two gears in the same line and dividing the line of force. The arrangement of Spiral Design Automotive Differential Gear allows one of the axles to turn faster than the other. These automotive differential gears are commonly used in automobiles to permit a difference in axle speed while turning. These automotive differential gears are also available in hypoid design.