answers: 1965
context: updated version of the 2000-2016 F-650/F750 cab. The medium-duty F-Series served as the donor platform for the B-Series cowled bus chassis produced from 1948 to 1998. Produced primarily for school bus bodies, the B-Series was discontinued as part of the sale of the Ford heavy-truck line to Freightliner in 1996. Above its medium-duty truck ranges, the Ford F-Series was used as a heavy-truck chassis during its early production. In 1951, Ford debuted its "Big Job" line, denoting the F-8 conventional. In 1958, the "Super Duty" and "Extra Heavy Duty" replaced the Big Job trucks, marking the debut of the Super </s> Ford F-Series (first generation) The first-generation Ford F-Series is a series of pickup trucks and commercial vehicles produced by Ford. Introduced in late 1947, the F-Series was the first post-war truck design from Ford. The first generation of the F-Series would remain in production until 1952. F-Series trucks were assembled at sixteen different Ford factories. Serial numbers indicate the truck model, engine, year, assembly plant, and unit number. The most common model was the F-1 with a 6 ½-foot bed followed by the F-2 and F-3 Express models with an bed. The first F-Series truck (known as the Ford Bonus-Built) </s> pickup in 1961 with the fourth generation F-Series. Longer and lower than its predecessors, these trucks had increased dimensions and new engine and gearbox choices. Additionally, the 1961–1963 models were constructed as a unibody design with the cab and bed integrated. This proved unpopular and Ford reverted to the traditional separate cab/bed design in 1964. In 1965, the F-Series was given a significant mid-cycle redesign. A completely new platform, including the "Twin I-Beam" front suspension, was introduced that would be used until 1996 on the F-150 and until 2016 on the F-250/350 4x2. Additionally that year, the Ranger name made
question: when did ford start the twin i beam