M939 Series

The M939 Truck is a 5-ton 6×6 U.S. military heavy truck. It was the successor to the M809 Series trucks. The basic cargo versions were designed to transport a 10,000 pounds (4,500 kg) cargo load over all terrain in all weather. Designed in the late 1970s to replace the M39 and M809 series of trucks, it has been in service ever since. The M939 evolved into its own family of cargo trucks, dump trucks, semi-tractors, vans, wreckers, and bare chassis/cabs for specialty bodies. 
In 1982 AM General, who built all M809s, began rebuilding M809s into the M939 and M939A1, approximately 24,100 were built. Rebuilding ceased in 1987. A follow-up model, the all-new M939A2 series, was produced by Bowen-McLaughlin-York (BMY) in Marysville, Ohio. They would build 20,490. Production ceased in 1991 when FMTV production commenced.
Approximately 44,590 were (in total) built. The series was preceded by the M35 and M809 series and followed by the FMTV.
=== Truck, Cargo M923 and variants ===
* M923 Cargo Truck, Standard Cargo Version (w/dropsides)
* M923A2 Cargo Truck, Standard Cargo Version (w/dropsides}; 3rd Generation, BMY built.
* M924 Cargo Truck, Standard Cargo Version (w/canvas top)
* M925 (M923 w/winch)
* M926 (M924 w/winch)
* M927 Long cargo truck
* M928A2 (M927 w/winch)
* M929 Dump Truck
* M930 (M929 w/winch)
* M931 Tractor truck
* M932 (M931 w/winch)
* M934 Expansible van
* M935 (M934 with hydraulic lift-gate)
* M936 Medium Wrecker
=== Truck, Chassis M939 and variants ===
The M939 to M945 were chassis with cabs, meant to carry specialized bodies. They were available in long and extra long wheelbases, and with or without front winches. The largest was the M945 used for Ribbon Bridge transporter bodies.
M0939 Series