The EMD SD40-2 is a 3,000-horsepower C-C road switcher 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 and the ALCO Century 630. It is Americas most commonly used diesel-electric locomotive to this day.
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