•YEARS BUILT: 1966-1988
•MANUFACTURER: EMD
•OPERATED ON: Most Class I freight railroads in North America
•NAMES: SD40, 40-2, Snoot (for extended nose versions), Tunnel Motor (for SD40T-2), High Hood (for SR and N&W), Wide Nose (for CN), Fast Forties (on UP)
•QUANTITY: 5,576 (1,296 SD40/SD40A/SDP40), (4,280 SD40-2, SD40T-2, SD40-2S, SD40-2F)
•HORSEPOWER: 3,000
•KNOWN FOR: Large platform areas extending at each end of the SD40-2 model
•STATUS: Many still in active service on Class I railroads, leasers, regionals, short lines, and industrials