The CO-OP D3 is a standard-tread farm tractor introduced in 1945 and built in Shelbyville, Indiana, USA. A total of 200 units were produced. It is powered by a Chrysler 4.1L 6-cylinder gasoline engine and features a Dodge 5-speed gear transmission with 5 forward and 1 reverse gears. The tractor has two-wheel drive, manual steering, and an open operator station.