M809 series 5-ton 6x6 truck

The M809 series was a family of five-ton 6x6 heavy tactical trucks that AM General built for the United States armed forces between 1970 and 1982. The basic cargo version was designed to carry a five-ton load over all terrain in all weather, with the payload doubling in on-road service. AM General developed it in the late 1960s as an updated version of the older M39 series, lengthening the hood and grille to fit a larger engine and updating the lighting to meet new safety regulations. It was powered by a Cummins NHC250 inline-six diesel, and the family covered cargo, bolster logging, wrecker, dump and tractor models. In 1982 the design was improved into the M939 series, whose first 11,000 trucks were rebuilds of M809s.