This is a NOS GM Transmission Main Shaft for 1940-1948 Chevrolet & GMC cars & trucks with 3-Speed Transmission. This shaft comes in the original GM box, but the box is in poor condition. Dimensions: 9-5/8" long with 6-splines. Original GM part number is 605022, ReplacesWT-242-2A Specific Applications: 1940-1947 All Passenger & Chevy Trucks with 3-speed; 1940-1947 GMC Trucks with 3-speed Series 100 & 150, AC, CC, EC, FC (250 AC, CC); 1948 Passenger with 3-speed