Marmon-Herrington's expertise on all-wheel drive vehicles was also called upon when the Canadian automotive industry geared up for war production: "Immediately after the war was declared, the Ford Motor Company of Canada were charged with the responsibility of developing a 4x4 truck for army use. Obviously, they had very little experience in this field [...] Consequently they went to the Marmon-Herrington Company, Indianapolis, who in peace time supplied conversion material to convert Standard Ford 4x2 trucks into 4x4 models for various commercial peace time usage. [...] these joints were unsuitable [...] [the weight of the more or less cab over engine design and heavy army wheels/tires put too much load on the front axle joints.] To solve this problem, "Bendix-Weiss and Rzeppa joints were chosen by General Motors and Ford respectively [...] [They later realized that the "Tracta" type was better but they were already tooled up with the above types, so left it as it was.] (The Design Record, Vol. 4, p. 27).
 

After conversion, data plates were fitted to the cab interior to show the truck was converted to all-wheel drive by the Marmon-Herrington Company and to instruct drivers about the shift patterns. Shown below, courtesy of Mike, is a typical set of these plates.
 

• Col. Herrington, abstracts from personal notes by Don Chew.
• Report of U.S. Army Mission to Netherlands East Indies August 8-20, 1941.
• Vanderveen, Bart H., The Observer's Fighting Vehicles Directory World War II. London: Frederick Warne & Co Ltd, 1969.

Wheels & Tracks magazine issue No. 40.