![M036a M036, an SD40-2 with a 2478 number and a string off ratty looking gons is southbound at Mortons Gap. July 20, 2009. Photo by Chuck Hinrichs](http://www.westkentuckynrhs.org/wp-content/uploads/2009/07/M036a.jpg)
2478 is not an SD40-2 it is an SD50-2. This unit and many others are ex Conrial SD50s that have been derated to 3000 hp and re-numbered in the 2400 series. Chuck Hinrichs
2478 is not an SD40-2 it is an SD50-2. This unit and many others are ex Conrial SD50s that have been derated to 3000 hp and re-numbered in the 2400 series. Chuck Hinrichs