Ford built the Ford GPW version of the World War II jeep.
Ford received wartime contracts in 1941 to produce Jeeps because Willys-Overland could not meet the military’s growing demand. Ford manufactured the vehicle from Willys blueprints, specifications, and patents, while using the powerful Willys engine so parts would remain interchangeable in military service.
The Ford version was designated GPW. The “W” referred to the Willys-designed engine and specification, distinguishing it from Ford’s earlier GP model. Ford introduced production changes, including a stamped nine-slot grille and other component details, but the GPW remained functionally equivalent to the Willys MB.
American Bantam created the original prototype design, and Willys-Overland became the primary producer, so those companies are often confused with Ford in this question. During World War II, Ford built roughly 280,000 Jeeps, while Willys produced about 363,000. Together, they supplied the standardized vehicle that became a military icon.