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Differential Service refers to the maintenance and repair of differentials, which are components in automotive transmissions that distribute power from the transmission to the wheels while allowing them to rotate at different speeds. This service typically includes inspecting and replacing differential fluid, as well as checking for wear and damage to gears, bearings, and other internal components. Regular differential service can help prolong the life of a vehicle's transmission and improve overall driving performance by ensuring proper power distribution to the wheels. It is an essential part of routine automotive maintenance and is often recommended every 30,000 to 50,000 miles or as specified by the vehicle manufacturer.