The GE C44-9W is a 4,400 hp (3,281 kW) diesel-electric locomotive built by GE Transportation Systems of Erie, Pennsylvania. Keeping in tradition with GE's locomotive series nicknames beginning with the "Dash 7" of the 1970s, the C44-9W was dubbed the Dash 9 upon its debut in 1993.
Part of GE's "Dash 9" series of locomotives, the Dash 9-44CW shares its frame, HiAd trucks, 16-cylinder 7FDL engine, and 752AH-31 traction motors with the GE Dash 9-40CW. But while the more common 9-44CW offers 4,400 horsepower (3,300 kW), software in the 9-40CW's engine-governing unit restricts its power output to 4,000 horsepower (3,000 kW).
The design has since proven popular with North American railroads, although some railroads, such as CSX and Canadian Pacific, preferred its AC equivalent, the AC4400CW. Because of more stringent emissions requirements that came into effect in the United States on January 1, 2005, the Dash 9-44CW has been replaced in production by the GE ES44DC.
The BNSF AC44C4M is an Ex-ATSF GE C44-9W rebuilt with AC traction motors and an A1A-A1A wheel arrangement. The internal controls are similar to those of the newer GE ES44C4.[1]
4470-4537, 4556-4587, 4591, 4592 and 4772-4978 sold to GECX following lease expiration with some being resold to G&W. 4385 and 4934 were wrecked and retired in 2002 and 2013 respectively. Some units sold to Fortescue Metals Group, Quebec, North Shore & Labrador, Canadian National, and Norfolk Southern (including ex-KCS units) and rebuilt into AC44C6M models. 100 units sold to KCS and some later sold to NS. 5530-5532 are warranty protection units, which were renumbered from 5841-5843. 25 of the GECX units were rebuilt to NS AC44C6Ms.
2500-2522 equipped with 'Canadian style' four-window cab, classified as Dash 9-44CWL; 50 units rebuilt into AC44C6M models. 2727 rebuilt from 2667. Units 2697-2726 sub-lettered for Illinois Central. Non four-window cab variants came equipped with a different style cab where the nose slants down on both sides, allowing the windows to be notched at the bottom outer corners, known as "teardrop" windows
These were uprated from 4000 to 4400 HP. All to be rebuilt to AC44C6Ms. 8917, 9100, 9368, 9522, 9632, 9796, 9847, 9874, and 9939 were wrecked and retired.