The Jeffery Quad, also known as the Nash Quad or Quad is a four-wheel drive, 11⁄2-ton rated truck that was developed and built by the Thomas B. Jeffery Company from 1912 in Kenosha, Wisconsin, and after 1916 by Nash Motors, which acquired the Jeffery Company. Production of the Quad continued unchanged through 1928.
The Quad introduced numerous engineering innovations. Its design and durability proved effective in traversing the muddy, rough, and unpaved roads of the times. The Quad also became one of the most successful vehicles in World War I. The Quad was produced in large numbers by Jeffery and Nash, as well as under license by other truck makers.
Development
The United States Army needed to replace the four-mule teams used to haul standard one-and-a-half-ton loads with a truck and requested proposals in late 1912.[1]
The company began development by purchasing and examining a new Four Wheel Drive Auto Company (FWD) truck, but found it to be unacceptable and sold the vehicle to begin their own design from scratch.[1]