The SD45 is a six-axle diesel-electric locomotive class built by General Motors Electro-Motive Division between 1965 and 1971. It has an EMD 645E3 twenty-cylinder engine generating 3,600 hp (2,680 kW) on the same frame as the SD38, SD39, SD40, and SDP40.

GCFX/Alstom 6000 Series units have been assigned by CN to the WC to replace retired SD45's. A special thank you to Alex Engelke, Matt Lastovich, Ken Reiss, and Ed Weisensel for several major updates Dave Schauer provided a major overview …

The SD45T-2 is a model of diesel-electric locomotive built by EMD for the Southern Pacific Railroad. Like the later SD40T-2 it is colloquially nicknamed a tunnel motor. 247 total units (including the original EMD/SP joint-venture prototype) were produced from February 1972 to June 1975, including 84 for SP's subsidiary Cotton Belt.

The SD45 was the most powerful and entered EMD's catalog in December, 1965 with the unveiling of Demonstrator #4351. The big locomotive was equipped with a 20-cylinder variant of the builder's new model 645E3 prime mover.

Feb 1, 2025 · The SD45 also marked the end of EMD's horsepower race of the 1960s, with the comparative reliability and versatility of the 3,000-horsepower SD40 paving the way for the hugely successful SD40-2.

Nov 6, 2024 · The builder took its SD45 model, a 20-cylinder monster first released in 1965 capable of producing 3,600 horsepower and utilizing the new model 645E3 prime mover, and began testing various ideas to correct the problem.

2 days ago · Introducing CN Tunnel Motors; Discussion relating to the Canadian National, past and present. Also includes discussion of Illinois Central and Grand Trunk Western and other subsidiary roads (including Bessemer & Lake Erie and the Duluth, Missabe & Iron Range Railway). Official site: WWW.CN.CA

The Atlas N Scale SD45 is an accurate rendition of the EMD design, matching many of the variations as seen during the production of the prototype locomotive. Features: All new tooling

The F45 was just an SD45 with a full-width cowl carbody. Built from 1968 to 1971, this style of carbody was suppose to improve fuel economy by reducing wind drag. GN loved the idea and loved the looks of the F45.

Title: WC SD45 #6516 = Wisconsin Cental Description: While this SD45 unit quietly sat in the Stevens Point, Wisconsin yard, Lynn Schneider was able to take its photo. This ex-BN #6527 was built in July of 1971 and was retired by the WC sometime in the early 2000's.