These transfer cases were used in Jeep MJ, SJ, XJ and ZJ 1980-1991. They were also installed in AMC Eagle 1980-1988 and Hummer 1986-1990. This is a brand new govt issue USA made shift fork. NSN# 2520-01-175-6494. Part Number 15111 or 13731. An item having two or more prongs which may have transverse hole(s), slot(s), dowel pin(s), pad(s), in or on the end of each prong, to provide a means to accomplish the engagement or disengagement of gear(s), shaft(s), clutch, or the like. The opposite end has facilities for a shaft, lever, or the like.