An EMD SD40T-2 is a 6-axle diesel locomotive built by General Motors Electro-Motive Division. Power is provided by a 16-cylinder EMD 645E3 diesel engine capable of producing 3,000 horsepower (2,240 kW). The Southern Pacific's locomotive features a 4,400-US-gallon (16,700 l) fuel tank and is 70 feet 8 inches (21.54 m) long. The Rio Grande's locomotive features a smaller 4,000-US-gallon (15,100 l) fuel tank. A total of 312 examples of this locomotive were built for North American railroads between April 1974 and July 1980. This locomotive, along with the SD45T-2, are popularly called tunnel motors, but are officially referred to as SD40-2s with "cooling system modifications" (and the EMD manuals so state), because they were specifically designed to be more effective when operating in tunnels. The major differences between this locomotive and its non-tunnel motor cousin, the SD40-2, are the radiator intakes and radiator fan grills located at the rear of the locomotive. The radiator air intakes in this model were located along the deck to allow more fresh, cooler air to enter and less hot exhaust fumes lingering around the tunnel's ceiling.

This locomotive model was purchased by the Southern Pacific Railroad, its subsidiary Cotton Belt, and the Denver and Rio Grande Western Railroad. At one point Southern Pacific and then later the Union Pacific owned every SD40T-2.

In 2005 most of these units were in service on the Union Pacific or various leasing companies. By 2008 none were left in service on the Union Pacific with SP or DRGW reporting marks. DRGW 5371 was the last one retired from active service in March 2008, and now resides at the Utah State Railroad Museum in Ogden Utah. The Union Pacific still runs many of these units in its own livery.

Original purchasersEdit

Railroad Quantity Road numbers Notes
Denver and Rio Grande Western Railroad 73 5341-5413 All with 81 in. or 88 in. short noses.
St. Louis Southwestern Railway ( Cotton Belt) 10 8322-8326, 8372-8376 "snoot noses"
Southern Pacific Railroad 229 8230-8299, 8300-8321, 8327-8341 8350-8371, 8377-8391, 8489-8573 8300 series featured extended "snoot" noses for radio control equipment.

Other ownersEdit

Railroad Quantity Road numbers Notes
Alabama & Tennessee River 3 2832, 2842, & 5387 2832 & 2842 still in UP yellow. 5387 still in "Bloody nose" paint lost speed lettering as of 5-10-11
America Latina Logistica
Buffalo & Pittsburgh 2 3301 & 3302 Both still in KCS Grey
Ferrovia Central Atlantico (Brazil) Rebuilt as metre gauge BB40T-2s
Kansas City Southern Rebuilt as SD40-3s
MNA (Missouri & North Arkansas Railroad)
New York Susquahanna & Western 4 3010, 3012, 3014, 3016 All units wear Susquehanna "Yellow Jacket" paint. 3014 has "snoot" nose, all others have 88" noses.
Respondek Rail Corporation (Squaw Creek Southern Railroad) 1 8795 Former UP 8795 & SP 8246
R.J. Corman 9 5353, 5361, 5372, 5409, 8307, 8336, 8569, 8718, 8861
Terminal Railroad Association (TRRA) 3001,3005
Union Pacific Most if not all Retired by now
Wheeling & Lake Erie 2 5391, 5413 Still in D&RGW paint

External linksEdit

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