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.

Oct 24, 2013 · Information about the SD40N locomotives rebuilt by Union Pacific as part of the railroad's SD40-2 Modernization Program at Jenks Shops in North Little Rock, Arkansas.

Feb 20, 2025 · This model was EMD's turbocharged, 16-cylinder variant and could provide 3,000 horsepower. By this time railroads were realizing the benefits of high horsepower, high tractive effort locomotives. The SD40 would go on to sell more than 1,200 examples while the even more powerful, 20-cylinder SD45 sold another 1,200+ units.

1566, Class SD40N, was built in November 1976, #766032-3, FN 766032-3, as C&NW 6928.

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The EMD SD40-2 is a 3,000-horsepower (2,200 kW) C-C diesel–electric locomotive built by EMD from 1972 to 1989.. The SD40-2 was introduced in January 1972 as part of EMD's Dash 2 series, competing against the GE U30C.Although higher-horsepower locomotives were available, including EMD's own SD45-2, the reliability and versatility of the 3,000-horsepower (2,200 kW) SD40-2 made it one of the ...

Rebuilt as SD40N as the main power for mother-slug unit with UPY 417. Horsepower, 3,000. Used for yard switching.

UP 1638 lashed up with her "Y" sister down near the wheel defect detector area along the entrance strip. A pair of SD40N locomotives take this yard job around the yard.

Y333, Class SD40N, was built in April 1973, #72684-12, FN 72684-12, as 3214, Class SD40-2. It was rebuilt as Class SD40-2R on April 27, 1992, and rebuilt as 2037, Class SD40N, on September 29, 2017. It was renumbered Y333 on February 15, 2018.