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Classic Streamliners - TRAIN​CYCLOPEDIA

SP 8238, an EMD DS40-T2, eastbound at Caliente, California, in the late 1980s.
By Slambo at en.wikipedia - Photo by Sean Lamb (User:Slambo), CC BY-SA 2.0,

GM-EMD Locomotives herald

EMD SD45T-2 vs SD40T-2 radiator fan motor access doors.

By Ken L Whitehead - personal collection, CC BY-SA 3.0,

EMD SD45T-2 vs SD40T-2 radiator fan motor access doors.

EMD SD40T-2 Diesel Electric Locomotive
The SD40T-2 is a 6-axle diesel-electric locomotive built by General Motors Electro-Motive Division having a 16-cylinder EMD 645E3 diesel engine producing 3,000 horsepower (2,240 kW). 312 SD40T-2s were built for North American railroads between April 1974 and July 1980. This locomotive and the SD45T-2 are popularly called tunnel motors, but EMD's term is SD40-2s with "cooling system modifications" because they were designed for better engine cooling in tunnels. The difference 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 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 Denver and Rio Grande Western Railroad, the Southern Pacific Railroad, and its subsidiary Cotton Belt. Southern Pacific's version has a 4,400-US-gallon (16,700 L; 3,660 imp gal) fuel tank and is 70 feet 8 inches (21.54 m) long. Rio Grande's version has a smaller 4,000-US-gallon (15,100 l; 3,330 imp gal) fuel tank. After merging with Rio Grande, the Southern Pacific and later Union Pacific owned every SD40T-2.

In 2005, most of these units were owned by Union Pacific or leasing companies. By 2008, none were left in service on UP with SP or DRGW reporting marks. DRGW 5371 was the last one, retired in March 2008, and now resides at the Utah State Railroad Museum in Ogden Utah. Another SD40T-2 is preserved at the Boone & Scenic Valley Railroad in Boone, Iowa. UP still runs a few units repainted in its own livery.

Original purchasers

Railroad:  Denver and Rio Grande Western Railroad

Quantity:  73
Road numbers:  5341-5413
Notes:  All with 81 in. or 88 in. short noses.

Railroad:  St. Louis Southwestern Railway (Cotton Belt)

Quantity:  10
Road numbers:  8322-8326, 8372-8376
Notes:  "snoot noses"

Railroad:  Southern Pacific Railroad

Quantity:  229
Road numbers:  8230-8299, 8300-8321, 8327-8341 8350-8371, 8377-8391, 8489-8573
Notes:  8300 series featured extended "snoot" noses for radio control equipment.

Other owners

Railroad:  Alabama & Tennessee River

Quantity:  3
Road numbers:  2832, 2842, & 5387
Notes:  2832 & 2842 still in UP yellow. 5387 still in "Bloody nose" paint lost speed lettering as of 5-10-11.

Railroad:  America Latina Logistica

Railroad:  Fort Worth and Western Railroad

Quantity:  3
Road numbers:  2015-2017, 3252

Railroad:  Buffalo & Pittsburgh

Quantity:  2
Road numbers:  3301 & 3302
Notes:  Both still in KCS Grey

Railroad:  Ferrovia Centro Atlântico (Brazil) Rebuilt as 1,000 mm (3 ft 3 3⁄8 in) metre gauge BB40T-2s.

Railroad:  GECX

Railroad:  HLMX

Railroad:  Indiana & Ohio

Quantity:  3
Road numbers:  IORY 4070, 4071, and 4072
Notes:  All wear RailAmerica red and gray.

Railroad:  Kansas City Southern

Notes:  Rebuilt as SD40-3s

Railroad:  LTEX

Railroad:  MNA (Missouri & Northern Arkansas Railroad)

Railroad:  NREX

Railroad:  New York Susquahanna & Western

Quantity:  4
Road numbers:  3010, 3014
Notes:  3012 and 3016 have been rebuilt into SD33ECO's. All units wear Susquehanna "Yellow Jacket" paint. 3014 has "snoot" nose, all others have 88 in (2.24 m) noses.

Railroad:  OHCR

Railroad:  Respondek Rail Corporation (Squaw Creek Southern Railroad)

Quantity:  1
Road numbers:  8795
Notes:  Sold to WE. Former UP 8795, SP 8246.

Railroad:  R.J. Corman

Quantity:  9
Road numbers:  5353, 5361, 5372, 5409, 8307, 8336, 8569, 8718, 8861

Railroad:  Terminal Railroad Association (TRRA)

Quantity:  2
Road numbers:  3001, 3005

Railroad:  Union Pacific

Notes:  Most retired.

Railroad:  Wheeling & Lake Erie

Quantity:  3
Road numbers:  5391, 5413, 8795
Notes:  WE 5391 and 5413 are still in D&RGW paint, WE 8795 wears UP colors, Ex-Squaw Creek.

Railroad:  Independent Locomotive Service (ILSX)

Quantity:  1
Road numbers:  1343
Notes:  Former UP 2906, UP 4429, & SP 8371.

EMD SD40T-2 Overview
Type and origin
Power type: Diesel-electric
Builder: General Motors Electro-Motive Division
Build date: June 1974 – July 1980
Total produced: 312
AAR wheel arrangement: C-C
Gauge: 4 ft 8 1⁄2 in (1,435 mm) standard gauge
Length: 70 ft 8 in (21.54 m)
Fuel capacity: 4,400 US gal (16,700 l; 3,660 imp gal)
Prime mover: EMD 645E3
Engine type: V16 diesel
Cylinders: 16
Performance figures
Power output: 3,000 hp (2,240 kW)
Notes:  409 kN (92,000 lbf) (starting)
Notes:  365 kN (82,000 lbf) (continuous)
Operators: Southern Pacific (and Cotton Belt), Rio Grande, Union Pacific
Nicknames "tunnel motors"
Locale: Western United States
Disposition: most still in service as of 2010

See also:

EMD SD40-2

EMD Diesel Locomotives

Diesel Locomotives