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For environmental issues, the Automotive Industry is always looking for opportunities in terms of weight and size reduction. This consequently results in fuel consumption reduction. This new concept is more compact, lighter, quieter, more efficient and with higher performance. These attributes are possible by a completely new differential design. The architecture of this space-saving component is completely different from traditional differential designs. Instead of using conventional differential pinions, the Lightweight Differential has spur gears arranged as a planetary gear set in one plane, as used in automatic transmissions. This means that the required space and weight are significantly reduced and the potential torque capacity is noticeably increased. The lightweight or spur gear differential has enormous advantages.