EMD GP40-2 Diesel-Electric Locomotive
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).

Production
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.

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.

Original buyers

Owner: Atlanta and West Point Rail Road

Quantity: 1
Numbers: 733
Notes: to Seaboard System Railroad to CSX.

Owner: Alaska Railroad

Quantity: 10
Numbers: 3000, 3007–3015
Notes: 3000 renumbered to 3006.

Owner: Baltimore and Ohio Railroad

Quantity: 218
Numbers: 4100–4162, 1977, GM50, 4185–4256, 4287–4311, 4322–4351, 4422–4447
Notes: Chessie System paint to CSX.

Owner: Boston and Maine Railroad

Quantity: 18
Numbers: 300–317

Owner: Chesapeake and Ohio Railway

Quantity: 95
Numbers: 4165–4184, 4267–4281, 4372–4421
Notes: Chessie System paint to CSX.

Owner: Ferrocarril Chihuahua al Pacífico (Mexico)

Quantity: 29
Numbers: 1008–1036

Owner: Conrail

Quantity: 129
Numbers: 3275–3403
Notes: to CSX and Norfolk Southern Railway, Nos. 3275-3279 ex-Reading Company.

Owner: Denver and Rio Grande Western Railroad

Quantity: 37
Numbers: 3094–3130
Notes: All to Union Pacific Railroad.

Owner: U.S. Department of Transportation

Quantity: 1
Numbers: 003

Owner: Detroit, Toledo and Ironton Railroad

Quantity: 20
Numbers: 406–425
Notes: to Grand Trunk Western Railroad 6406–6425.

Owner: Florida East Coast Railway

Quantity: 24
Numbers: 411–434
Notes: 433–434 were last units built

Owner: Georgia Railroad

Quantity: 2
Numbers: 755–756
Notes: to Seaboard System Railroad to CSX

Owner: Kansas City Southern Railway

Quantity: 4
Numbers: 796–799

Owner: Louisville and Nashville Railroad

Quantity: 17
Numbers: 6600–6616
Notes: Family Lines Paint, to Seaboard System Railroad to CSX

Owner: Reading Company

Quantity: 5
Numbers: 3671–3675

Owner: Richmond, Fredericksburg and Potomac Railroad

Quantity: 7
Numbers: 141–147
Notes: to CSX

Owner: St. Louis – San Francisco Railway (“Frisco”)

Quantity: 25
Numbers: 750–774
Notes: to Burlington Northern 3040–3064

Owner: St. Louis Southwestern Railway (“Cotton Belt”)

Quantity: 56
Numbers: 7248–7273, 7628–7657

Owner: Seaboard Coast Line Railroad

Quantity: 25
Numbers: 1636–1656. 6617–6621 6617–6621
Notes: Family Lines paint; all to Seaboard System Railroad now CSX

Owner: Ferrocarril Sonora-Baja California (Mexico)

Quantity: 15
Numbers: 2104–2112, 2309–2314

Owner: Southern Pacific Transportation Company

Quantity: 68
Numbers: 7240–7247, 7608–7627, 7658–7677, 7940–7959

Owner: Texas, Oklahoma and Eastern Railroad

Quantity: 3
Numbers: D15–D16, D20

Owner: Western Maryland Railway

Quantity: 35
Numbers: 4257–4261,4312–4321, 4352–4371
Notes: Chessie System paint to CSX

Owner: Western Pacific Railroad

Quantity: 15
Numbers: 3545–3559

Owner: Western Railway of Alabama

Quantity: 1
Numbers: 708
Notes: to Seaboard System Railroad to CSX

Total Units: 851

Units built by General Motors Diesel, Canada Original Owners

Owner: Canadian National Railway

Quantity: 268
Numbers: CN 9400–9667, 9668–9677
Notes: CN 9400–9632 are GP40-2L, 9633–9677 are GP40-2W. CN 9668–9677 are former GO Transit units purchased in 1991.

Owner: GO Transit

Quantity: 11
Numbers: GO 700–710
Notes: Ten to CN 9668–9677 in 1991. One (703) to Miami Tri-Rail, later sold to Aberdeen, Carolina & Western No. 703.

Total Units: 279

GP40P-2 Original Owners

Railroad: Southern Pacific Transportation Company

Quantity: 3
Numbers: 3197-3199
Notes: renumbered to 7600,7601 and 7602. 7601 and 7602 went to UP as 1373 and 1375. 7600 went to IHB as 4010

Total Units: 3

EMD GP40-2 Overview
Type and origin
Power type: Diesel-electric
Builder: General Motors Electro-Motive Division, General Motors Diesel (GMD)
Model: GP40-2
Build date: 1972 - 1986
Total produced: 1,143
Specifications
Configuration:
​ • AAR B-B
Gauge: 4 ft 8 1⁄2 in (1,435 mm) standard gauge
Prime mover: EMD 645E3
Aspiration: Turbocharged
Cylinders: 16
Performance figures
Power output: 3,000 hp (2.24 MW)

Career
Locale: North America

See also:

EMD GP-40

Electro Motive

EMD Diesel-Electric Locomotives

Diesel-Electric Locomotives

Locomotives

Classic Streamliners - TRAIN​CYCLOPEDIA

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A pair of EMD GP40-2 coupled back-to-back for use in remote control switching operations at Tampa, Florida.
By Harvey Henkelman, Attribution, https://commons.wikimedia.org/w/index.php?curid=3001201

A pair of EMD GP40-2 coupled back-to-back for use in remote control switching operations at Tampa, Florida.
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