SIX PROTOTYPES WERE DESIGNED FOR USE IN WORLD WAR TWO -- THE FIRST PRODUCTION VEHICLES BECAME AVAILABLE IN 1951 -- COMONALY KNOWN AS THE WDX SERIES-M37 -- RATED AT 1 1/4 TONS -- THEIR ENGINES WERE 250 CU. IN. 6 CYL. WHICH WERE RATED AT 94 H.P. -- T445 4 SPEED... via V12 Software