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EMD GP40

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description EMD GP40 Overview

The EMD GP40 is a four-axle diesel-electric locomotive built by the Electro-Motive Division (EMD) of General Motors between 1965 and 1971. It was among the first mass-produced American locomotives to use a turbocharged engine, utilizing EMD's 16-cylinder 645E3 power plant to generate 3,000 horsepower. The locomotive uses a B-B wheel arrangement, making it suitable for general freight service across various terrains. Many GP40 units were later rebuilt or upgraded by railroads and leasing companies, extending their operational lifespan well beyond their original production years.

help EMD GP40 FAQ

What does the 'GP' stand for in the EMD GP40 locomotive?

The 'GP' in EMD GP40 stands for 'General Purpose,' designating it as a four-axle road switcher locomotive. Produced by General Motors' Electro-Motive Division (EMD), it was introduced to the North American market in 1965.

How much horsepower does the EMD GP40 produce?

The GP40 is rated at 3,000 horsepower, utilizing a turbocharged EMD 645E3 diesel V16 prime mover. This was a significant technological leap when it debuted in 1965, allowing it to outperform the earlier 2,500-horsepower GP35.

How long was the EMD GP40 in production?

General Motors' Electro-Motive Division produced the GP40 from 1965 until 1971. During this six-year window, they built over 1,000 units for major freight railroads across North America.

What visual feature distinguishes the EMD GP40 from older models?

The EMD GP40 features a distinct, oversized radiator intake located on the long hood roofline, which fans nicknamed the 'flared radiator.' This larger cooling system was necessary to prevent the powerful, turbocharged 3,000-horsepower engine from overheating.

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