The EMD SD40 is an American 6-axle diesel-electric locomotive built by General Motors Electro-Motive Division between January 1966 and August 1972. 1,268 locomotives were built between 1966 and 1972. In 1972, an improved version with new electronics was developed and marketed as a new locomotive, the SD40-2.
Southern Pacific 7342, an SD40R, in 1980
GMD SD40 KCSM 3029 in Caltzonzin Station
GTW/CN #5945, a former GMD-built CN SD40, rebuilt to SD40-3 standards.
Last Mountain Railway SD40-3 at Aylesbury, Saskatchewan
The EMD SD40-2 is a 3,000-horsepower (2,200 kW) C-C diesel-electric locomotive built by EMD from 1972 to 1989.
Montana Rail Link XDM SD40-2 diesel locomotive 250 at Everett, Washington, United States, January 1994
NS 3204, an example of a SD40-2 built with a high short hood.
NS 3408, which rides on Flexicoil C trucks.
Ohio Central Railroad System 5855 was built with an extended rear deck.