Editing GE Genesis (section)

====Upgraded and "Stimulus" P40DCs====
By 2007, New Jersey Transit had upgraded their P40DC units with updated prime movers to match the {{convert|4250|hp}} of the successor P42DC.<ref>{{cite web|url=http://rrpicturearchives.net/showPicture.aspx?id=878935 |title=NJT 808 |author=Donald Albertson |date=September 13, 2007 |publisher=rrpicturearchives.net |access-date=September 27, 2010 |url-status=dead |archive-url=https://web.archive.org/web/20110716051936/http://rrpicturearchives.net/showPicture.aspx?id=878935 |archive-date=July 16, 2011 }}</ref> This was done by readjusting the position of the lay shafts within the prime mover.{{Citation needed|date=October 2017}}

Amtrak returned 15 of their P40DC units to service as part of a project funded through the [[American Recovery and Reinvestment Act of 2009]].<ref>http://www.amtrak.com/pdf/ARRA/Amtrak-ARRA_Project-Summary-FY-09.pdf Amtrak ARRAProject List</ref> The first of the units were returned to service in March 2010 after being overhauled at the [[Beech Grove Shops]]. They were upgraded like NJT's units had been a few years before to have {{convert|4250|hp|abbr=on}} and match the P42DC's maximum speed of {{convert|110|mph|sigfig=3|abbr=on}}. They also received updated [[Cab signalling|cab signaling]] systems. The upgraded locomotives still have mechanical [[Railway air brake|air brakes]], which makes them most suitable for trains that only require a single locomotive. This differs from the electronic air brakes on the P42DC and P32AC-DM.<ref name="trains-oct-2010">{{cite magazine|title=Beech Grove to the Rescue|magazine=[[Trains (magazine)|Trains]]|date=October 2010|author=Bob Johnston|volume=70|issue=10|pages=48–53}}</ref> They also feature a [[builder's plate]] indicating that they were rebuilt under the auspices of the [[American Recovery and Reinvestment Act of 2009|TIGER]] stimulus program.

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