The Simpson Jumbo C is a farm tractor produced from 1947 to 1949 by Simpson Jumbo in Azusa, California, USA. It features a Chrysler 3.6L 6-cylinder liquid-cooled gasoline engine with a 5-speed transmission offering 5 forward and 1 reverse gears. The tractor is two-wheel drive with manual steering and an open operator station. It was available in two variants: B with a tricycle front and C with a wide front.