New in the torn up OEM box – 1939 1940 1941 1942 1946 Chevy GMC big truck low speed double reduction mechanical shift ring and pinion gear set – P.N. 608770 and 3847024 – group number GR.5.478 - Tooth count 14:44 – OEM GM Chevy brand gear – Ring stamped D 758, A9B and 8720 – includes OEM heavy duty installation rivets shown - please check pictures and part number against your application - gears have been sitting in a former collector’s dusty inventory for years in nice dry storage and have recently been pulled out and inspected – mostly cosmoline coated with some very light surface discoloration/corrosion from sitting as shown