The EMD GP40-2 is a 4-axle diesel road switcher locomotive built by General Motors Electro-Motive Division as part of its Dash 2 line between April 1972 and December 1986. The locomotive's power is provided by an EMD 645E3 16-cylinder engine which generates 3,000 horsepower (2.24 MW).
A pair of EMD GP40-2 coupled back-to-back for use in remote control switching operations - Tampa, Florida.
Standard GP40-2 production totalled 861 units, with 817 built for U.S. railroads, and 44 for Mexican railroads. In addition, three GP40P-2s, passenger versions of the GP40-2, were built for Southern Pacific in 1974, and 279 GP40-2L(W) and GP40-2(W) units, equipped with wide-nosed cabs, were built by General Motors Diesel (GMD), for Canadian National and GO Transit between 1974 and 1976. Of the CN units, 233 were built with a taller and lighter frame to allow for a larger fuel tank. These units were officially classified GP40-2L but are commonly referred to as GP40-2L(W). The balance of CN's fleet, 35 units, and the 11 unit GO Transit fleet, used standard frames and smaller fuel tanks; they are often referred to as GP40-2(W) but are classified as GP40-2. Total production of the GP40-2 and its variations totalled 1,143 units.
Although the GP40-2 was a sales success, it sold fewer units than the earlier GP40 and the contemporary GP38-2 and SD40-2 models. The popularity of high-horsepower 4-axle diesels began to decline with the GP40-2, with 6-axle models gaining in popularity for their superior low-speed lugging performance.
Like the SD40-2 the GP40-2 has a reputation for reliability, and many are still in use. Changes such as the modular electronics system improved reliability over the GP40. Their high power-per-axle rating suited them to high-speed service rather than low-speed drag freights.
With the usual 62:15 gearing (65-70 mph maximum) EMD rated the GP40-2 at 55,400 lb continuous tractive effort; for compatibility with other units, most (all?) had the PF21 module that reduced horsepower below 23 mph, bringing the minimum continuous speed down to 11 mph.
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|Atlanta and West Point Rail Road||1||733||to Seaboard System Railroad to CSX|
|Alaska Railroad||10||3000, 3007–3015||3000 renumbered to 3006|
|Baltimore and Ohio Railroad||218||4100–4162, 1977, GM50, 4185–4256, 4287–4311, 4322–4351, 4422–4447||Chessie System paint to CSX|
|Boston and Maine Railroad||18||300–317|
|Chesapeake and Ohio Railway||95||4165–4184, 4267–4281, 4372–4421||Chessie System paint to CSX|
|Ferrocarril Chihuahua al Pacífico||29||1008–1036|
|Conrail||129||3275–3403||To CSX and Norfolk Southern Railway, #3275-3279 ex-Reading Company|
|Denver and Rio Grande Western Railroad||37||3094–3130||All to Union Pacific Railroad.|
|U.S. Department of Transportation||1||003|
|Detroit, Toledo and Ironton Railroad||20||406–425||to Grand Trunk Western Railroad 6406–6425.|
|Florida East Coast Railway||24||411–434||433–434 were last built|
|Georgia Railroad||2||755–756||to Seaboard System Railroad to CSX|
|Kansas City Southern Railway||4||796–799|
|Louisville and Nashville Railroad||17||6600–6616||Family Lines Paint, to Seaboard System Railroad to CSX|
|Richmond, Fredericksburg and Potomac Railroad||7||141–147||to CSX|
|St. Louis – San Francisco Railway ("Frisco")||25||750–774||to Burlington Northern 3040–3064|
|St. Louis Southwestern Railway ("Cotton Belt")||56||7248–7273, 7628–7657|
|Seaboard Coast Line Railroad||25||1636–1656. 6617–6621||6617–6621 Family Lines paint; all to Seaboard System Railroad now CSX|
|Ferrocarril Sonora-Baja California||15||2104–2112, 2309–2314||2104-2112 have High short hoods w/steam generator for passenger service only GP40-2 built with high short hoods|
|Southern Pacific Transportation Company||68||7240–7247, 7608–7627, 7658–7677, 7940–7959|
|Texas, Oklahoma and Eastern Railroad||3||D15–D16, D20|
|Western Maryland Railway||35||4257–4261,4312–4321, 4352–4371||Chessie System paint to CSX|
|Western Pacific Railroad||15||3545–3559|
|Western Railway of Alabama||1||708||to Seaboard System Railroad to CSX|
- Units built by General Motors Diesel, Canada
|Canadian National Railway||268||CN 9400–9667, 9668–9677||CN 9400–9632 are GP40-2L, 9633–9677 are GP40-2W.|
CN 9668–9677 are former GO Transit units purchased in 1991.
|GO Transit||11||GO 700–710||Ten to CN 9668–9677 in 1991. One (703) to Miami Tri-Rail, later sold to Aberdeen, Carolina & Western #703.|
|Southern Pacific Transportation Company||3||3197-3199|
- Foster, Gerald (1996). A Field Guide to Trains. New York, NY: Houghton Mifflin Company. ISBN 0-395-70112-0.
- Pinkepank, Jerry A. (1973). The Second Diesel Spotter's Guide. Milwaukee, Wisconsin: Kalmbach Publishing. ISBN 978-0-89024-026-7.
- Kristopans, Andre. "GM Serial Number Webpage". Archived from the original on 2013-02-22.
- Adel, Aaron. "Transit Toronto Webpage".
|Wikimedia Commons has media related to EMD GP40-2 locomotives.|