The Allis Chalmers W Speed Patrol is a motor grader produced from 1940 to 1950 by Allis Chalmers at factories in LaPorte, Indiana and Springfield, Illinois. It features a 3.3L 4-cylinder liquid-cooled gasoline engine producing power through a two-wheel drive with manual steering and an open operator station. It is related to the WC Speed Maintainer model produced from 1938 to 1941.