Part Number: 5122985. 1940-1995 Detroit Diesel Series 71 4-71 6-71 8V71 Rear Gear Train. 1960-1995 Detroit Diesel V71 6V71 8V71 12V71 Rear Gear Train. 1973-1995 Detroit Diesel Series 92 6V92 8V92 12V92 Rear Gear Train.