Restriction device for differential gear

摘要

A restriction device for a differential gear having multiplate clutches which are formed by first friction plates fixed to a pair of side gears installed inside of a differential casing and second friction plates fixed to the differential casing. The first and second friction plates are alternately situated and are in contact with each other, wherein one of the frictional faces of the friction plates is treated by cold rolling while the other is coated with a self-lubricating agent so as to minimize the tendency of increasing differential movement of both side gears.