The EMD GP40 is a 4-axle diesel-electric locomotive built by General Motors' Electro-Motive Division between November 1965 and December 1971. It has an EMD 645E3 16-cylinder engine generating .
The GP40 is longer than its EMD 567D3A-engined predecessor, the GP35, and distinguished visually by its three 48-inch radiator fans at the rear of the long hood, while the GP35 has two large fans and a smaller one in between. It was built on a frame; the GP35 was built on a frame - as was the GP7, 9, 18, and 30. The difference in length can be seen in the GP40's ten handrail stanchions compared to the GP35's nine.
1,187 GP40s were built for 28 U.S. railroads; 16 were built for one Canadian carrier, Canadian National; and 18 were built for two Mexican carriers, Ferrocarril Chihuahua al Pacífico and Ferrocarriles Nacionales de México. 60 units were built with high-short-hoods and dual control stands for Norfolk & Western Railway. Two passenger versions, the GP40P and GP40TC, were also built, but on longer frames to accommodate steam generators and HEP equipment.
On January 1, 1972, the GP40 was discontinued and replaced by the GP40-2, which has a modular electrical system and a few minor exterior changes.
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Original owners +RailroadQuantityRoad NumbersNotesAtlanta and West Point Railroad7726-732Atlantic Coast Line Railroad15915-929To Seaboard Coast Line 1500-1514Baltimore and Ohio Railroad1613684-3779, 4000-4064Chesapeake and Ohio Railway503780-3794, 4065-40993794 was the last GP40 builtFerrocarril Chihuahua al Pacífico81000-1007Chicago, Burlington and Quincy Railroad40170-189, 620-639Canadian National Railway164002-4017Built by General Motors Diesel (GMD) for use in CanadaDe Queen and Eastern Railroad1D-7Denver and Rio Grande Western Railroad433051-3093Detroit, Toledo and Ironton Railroad6400-405Florida East Coast Railway10401-410Georgia Railroad and Banking Company4751-754Illinois Central Railroad753000-3074Louisville and Nashville Railroad303000-3029Milwaukee Road72153-199, 2047-20712068-2071 were EMD warranty loanersMissouri–Kansas–Texas Railroad61170-230Norfolk and Western Railway601329-1388High-noseFerrocarriles Nacionales de México108400-8409New York Central Railroad1053000-31043036 was the first GP40 built. To Penn Central.Penn Central Transportation Company1703105-32743260-3274 were EMD warranty loaners 11-26Richmond, Fredericksburg and Potomac Railroad7121-127Chicago, Rock Island and Pacific Railroad77340-396, 4700-4719Financed by Union Pacific, because of the proposed UP-RI mergerSeaboard Air Line Railroad51600-650To Seaboard Coast Line 1515-1565Seaboard Coast Line Railroad701566-1635Soo Line Railroad4732-735St. Louis Southwestern Railway (Cotton Belt)87600-7607All were rebuilt into the model GP40R and renumbered 7960-7967.Texas, Oklahoma and Eastern Railroad3D-12 - D-14Toledo, Peoria and Western Railway11000Ex-EMD warranty loanerWestern Railway of Alabama7701-707Western Maryland Railway53795-3799Western Pacific Railroad443501-35443501-3516 built with large Pyle single headlightTotals 1,221
GP40P Railroad Quantity Road numbers NotesCentral Railroad of New Jersey133671-3683Totals 13
GP40TC Railroad Quantity Road numbers NotesCanadian National Railway8600-607Totals 8
Rebuilds
GP40N Union Pacific has rebuilt 129 of their GP40's and GP40-2's into GP40N's at their Jenk's shop. These units received a microprocessor control system to increase adhesion, control options, and extend the life of the locomotive.
GP40R The St. Louis Southwestern Railway (Cotton Belt) ordered eight locomotives from EMD but rebuilt all eight of them into GP40R's between January and June of 1982.
GP22ECO
The GP22ECO is a locomotive built from recycled GP40/GP40-2 parts. The frame, trucks, and carbody are refurbished, while the 16-645 engine is replaced with a new 8-710-ECO engine. The electrical system is replaced with a modern microprocessor-based system. Horsepower is reduced to 2,150 due to the smaller engine.
Preservation Baltimore & Ohio #3684 is preserved at the National Museum of Railroad History & Innovation in Baltimore, Maryland.
Penn Central #3118 is operational at the Austin Steam Train Association (ASTA) as ATCX #3118. The locomotive currently wears a blue paint scheme from its previous owner (Horizon Rail). It has also been updated with a microprocessor, making it a GP40-3.
See also EMD GP40-based passenger locomotives List of GM-EMD locomotives List of GMD Locomotives
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