The EMD Model 40 was a two-axle diesel-electric locomotive built by Electro-Motive Corporation (EMC), and its corporate successor, General Motors' Electro-Motive Division (EMD) between August 1940 and April 1943. Nicknamed "critters", eleven examples of this locomotive were built. Powered by twin General Motors Detroit Diesel 6-71 diesel engines, which produce a combined 300 horsepower (224 kW). Original buyers included the Electro-Motive Corporation/EMD Plant #2 switcher, Defense Plant Corporation-4 units, the United States Army 3 units, and the United States Navy 2 units, General Motors Cleveland Diesel Division 1 unit.
- s/n 1134 Built as EMC 1134 Demonstrator, Later Devco Railway #20, retired to Museum of Industry, Stellarton, Nova Scotia
- s/n 1308 Built for US Rubber, to Old Ben Coal, scrapped
- s/n 1309 Built for US Rubber, to Penn Dixie Cement, retired to Lake Superior Railroad Museum at Duluth, Minnesota
- s/n 1834 Built as USAX 7403, to DPC #1 Cushing Stone Company of Amsterdam, New York
- s/n 1835 Built as DPC #2, to American Steel Foundry 51, to Hoosier Valley Railroad Museum in North Judson, Indiana
- s/n 2284 Built as USAX 7952, to Acme Newport Steel, Newport, KY as NPTX #1. Owned and restored by Professional Loco services in East Chicago, Indiana
- s/n 2285 Built as USAX 7953, to Walkersville Southern Railroad, Walkersville, Maryland
- s/n 2286 Built as USAX 7954, scrapped
- s/n 2287 Built as USN #4, to York County Heritage Trust of York, Pennsylvania
- s/n 2288 Built as USN #56-00323, to McDonnell Douglas, retired to Travel Town Museum, Los Angeles, California
- s/n 2289 Built as GM Cleveland (unknown number), scrapped
- Extra 2200 South Issue #53 pages 22–23.