Editing EMD SD40-2 (section)

===SD40-3===
The Dash 3 suffix is not part of any official lineup, and is a loose designation for rebuilt Dash 2 series EMDs among several different railroads. 

One example of an SD40-3 rebuild program is the one conducted by [[CSX]] at its Huntington, WV Shops. It started in 2010 with 10 units upgraded and numbered 4000-4009; in 2011, 20 units went through the program and were numbered 4010-4029 and in 2012 another 20 units followed and were numbered 4030-4049. One of the most notable rebuilds was SD40-2 [[CSX 8888 incident|8888]], (now rebuilt to 4389), which in 2001 was involved in a runaway incident caused by the failure of the engineer to notice the train gradually accelerating during yard switching.<ref>{{cite news|last1=Ross|first1=Jim|title=New power from old: CSX locomotive rebuild program preserves jobs in Huntington, WV|url=http://www.statejournal.com/story/29895467/new-power-from-oldcsx-locomotive-rebuild-programpreserves-jobs-in-huntington-wv|access-date=2015-04-10|work=[[The State Journal (West Virginia)|The State Journal]]|date=2015-09-26|archive-url=https://web.archive.org/web/20150830010232/http://www.statejournal.com/story/29895467/new-power-from-oldcsx-locomotive-rebuild-programpreserves-jobs-in-huntington-wv|archive-date=2015-08-30|url-status=dead}}</ref>  These locomotives feature new cabs, air conditioning systems, and other new technologies.

Norfolk Southern also has an ongoing SD40-3 rebuild program as of 2023.
<ref>{{cite web|title=The last grimy few: Norfolk Southern high hoods|date=18 July 2023 |url=https://www.trains.com/trn/railroads/locomotives/the-last-grimy-few-norfolk-southern-high-hoods/|access-date=4 April 2024}}</ref>