For the 1953 model year, Ford introduced a second generation of the F-Series trucks. Increased dimensions, improved engines, and an updated chassis were features of the second generation. In another change, the model nomenclature of the F-Series was expanded to three numbers; this remains in use in the present day. The half-ton F-1 became the F-100 (partially influenced by the North American F-100 Super Sabre); the F-2 and F-3 were combined into the -ton F-250, while the F-4 became the one-ton F-350. Conventional F-Series trucks were F-500 to F-900; COE chassis were renamed C-Series trucks.
