In 1976, Conrail inherited thirteen 3,600hp SD45-2's from the Erie Lackawanna, which had purchased the units in 1972 and were the EL's last new locomotives before Conrail. The EL purchased the locomotives for fast freight service, equipping them with an extra-large 5,000-gallon fuel tank so the units could run without refueling between New York and Chicago. Plus the larger fuel tank added to the overall weight of the locomotives, thereby increasing their tractive effort. When the EL moved the engines' airhorns to a position in front of the cab and below the roof line, the SD45-2's could work in ore service in the Cleveland, OH, area.Unfortunately, the units did not see the same freight service under Conrail as they did under the EL due to the SD45-2's HT-C trucks. As mentioned on the SD40-2 Prototype page, Conrail was wary of the new HT-C trucks that EMD had been placing on their all their six-axle Dash-2 locomotives. As a result, in 1977 Conrail mandated that all SD40-2's be delivered with the older, proven Flexicoil trucks. Since the SD45-2's had HT-C trucks, Conrail restricted them to pusher duty over Horseshoe Curve in Central Pennsylvania. Some other locomotives to serve pusher duty over the years were SD35's, SD40's, SD40-2's, SD45's, SDP45's, SD50's, SD60's, C30-7's, C36-7's, and a handful of ALCo's.
During the early 1990s, the aging SD45-2's were removed from full-time pusher duty and helped on Black Lick coal trains in the Altoona area, though they did reappear in pusher duty from time to time until 1997. By 1996 all the units had been repainted in the Quality scheme. Shortly after that, all 13 units were leased off to the Canadian National and other railroads. They appeared on the Union Pacific and the Burlington Northern, for example, and by late 1996 sporadically in regular Conrail freight service in Eastern Pennsylvania.
In 1998 while on lease to Canadian National, CR 6656 and 6660 suffered an engine failure, were repaired, then sold off to northeastern regional, Reading & Northern. On a similar note, sometime between 1995 and 1997 CR 6661 was rebuilt with a 16-cylinder 3,000hp and reclassed as an SD40-2. The remaining units eventually found their way back into general freight service until the end of Conrail until they were transferred to CSX and Norfolk Southern in June 1999. 
Comprehensive EMD SD45-2 Roster
Builder's
CR # Former Built Numnber Notes
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6654 EL 3669 07/72
6655 EL 3670 07/72
6656 EL 3671 07/72 Engine failure Summer '98, sold to Reading & Northern
6657 EL 3672 07/72
6658 EL 3673 07/72
6659 EL 3674 07/72
6660 EL 3675 07/72 Engine failure Summer '98, sold to Reading & Northern
6661 EL 3676 07/72 1995-97 rebuilt 3,000hp 16-cyl engine, reclassed SD40-2
6662 EL 3677 07/72
6663 EL 3678 07/72
6664 EL 3679 07/72
6665 EL 3680 07/72
6666 EL 3681 07/72