SD7
Only two Penn Central, former Pennsylvania Railroad, SD7 locomotives went to Conrail in 1976, becoming CR 6998 and CR 6999.
SD9
Former Pennsylvania Railroad and then Penn Central SD9 locomotives became Conrail 6900-6925. Primarily hump-duty locomotives, the SD9's were retired in the early 1980's.
SD35
Former Penn Central and Central Railroad of New Jersey SD35 locomotives became Conrail 6000-6051. Conrail retired all their SD35 locomotives by 1984.
SD38
The SD38 (CR 6925-6959) was best suited for hump and yard duty. Conrail inherited their fleet from the Penn Central and often paired them with slugs.
SD40
Conrail inherited its entire SD40 fleet (CR 6240-6357) from the Jersey Central and Penn Central. By 1976, production on the 3,000hp SD40 had been replaced with the upgraded Dash-2 series.
SD40-2
In 1977 the first order of SD40-2's came on Conrail property. With their high-tractive effort and horsepower, they quickly replaced aging SD45's on mainline trains, taking the series 6358-6524.
SD40-2R
In 1993 Conrail began rebuilding 40 SD40's to the improved Dash-2 specifications, assigning them to series 6960-6999.
SD45
Conrail inherited their SD45's from Penn Central, Reading Railroad, and Erie Lackawanna, placing them in CR 6066-6239. Maintenance headaches and inefficient, the SD45's were eventually replaced by SD40-2's.
SD45-2
Conrail inherited 13 3,600hp SD45-2's from Erie Lackawanna, placing them in series CR 6654-6666. Famous as pushers over the Horseshoe Curve, all units survived until 1999.
SDP45
All Conrail SDP45's (CR 6667-6699) came from the Erie Lackawanna, which purchased the units in two orders in 1969 for fast merchandise freights.
SD50
Between 1983-1986 Conrail purchased 135 3,500+ horsepower SD50's in series CR 6700-6834, making Conrail the second largest owner in the nation.
SD60
In 1985, Conrail purchased the original three SD60 demo units, making them CR 6840-6842. Then in 1989 they purchased another 25 units, making them CR 6843-6867.
SD60M
In late 1992, Conrail purchased 74 3,800hp SD60M's, basically SD60's with a wide-cab, assigning them series CR 5500-5574. CR 5544 is an SD60I.
SD60I
Unable to purchase more SD60M's from an over-booked EMD, Conrail's Juniata shops assembled SD60I kits that EMD supplied, assigning finished units to CR 5575-5654 and CR 5544.
SD70
The last locomotives to wear Conrail blue, the standard-cab DC-powered SD70 (CR 2557-2580), were purchased by Norfolk Southern instead of the ordered SD80MAC's. The units follow NS numbering.
SD70MAC
Conrail purchased the 4,000hp SD70MAC instead of more SD80MAC's, building the units to CSX specifications. These were the final locomotives to wear the special "white-face" paint scheme and were given series CR 6700-6834.
SD80MAC
Needing high-horsepower, high-tractive-effort locomotives in the 1990's for hauling coal over the Pittsburgh and Boston Lines, Conrail purchased General Motors Locomotive Group's (GMLG) new 5,000hp SD80MAC, placing them in CR 4100-4129.