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. As of 2023, most SD45s have been retired, scrapped or rebuilt to SD40-2 standards.

Electro-Motive was determined to win the horsepower race of the 1960s and cataloged its most powerful standard model in late 1965, the SD45. To achieve its goal, EMD increased the size of its new 645 power plant to 20 cylinders, which increased horsepower to 3,600.

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 EMD SD45-2 is a 6-axle diesel-electric locomotive built by General Motors Electro-Motive Division (EMD). EMD built 136 locomotives between 1972 and 1974, primarily for the Atchison, Topeka and Santa Fe Railway (ATSF).

Jan 18, 2012 · The Electromotive Division SD45 is a 6 axle, 3,600 HP diesel-electric locomotive built by EMD from 1965 to 1971. It used a 20 cylinder 645E3 engine rated at 3,600 HP. At the time, it was the most powerful single engine locomotive built. It debuted in 1965/66 with the rest of EMD's then new locomotives featuring the all new 645 engine.

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. Their plan was to have a …

Great Northern SD45 #400. blt 1966 cn 31598 to 31598 Daniel Dawdy: CNW SD45 w/o Dyna #906, blt 1967 cn32629, to SP 8663 LS Melin: EMD SD45 #4353, blt 1966 cn31695, to NDM 803 Warren Calloway: EMD SD45 #4351, Chicago IL 1966, blt 1966 cn31693, to IC 7000 Karl Henkels-DR: EMD SD-45 Demo #4352 , Barr IL 1966, to DH802, cn31694 blt 1966

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.

Apr 16, 2025 · Here's a chance to get all the info related to SD-45, SD-45-2 and SD-45X Seies Locomotives. All questions, comments and info should be placed here. Thanks, and ENJOY!!!

The SD45T-2 is a six-axle diesel electric locomotive built by General Motors Electro-Motive Division having a 20-cylinder 645-series diesel engine producing 3600 horsepower. Over 200 examples were produced between 1972 and 1975.