Wabtec C44ACM

Technical Specifics

The AC44C6M emerged from a cooperative effort between GE Transportation and several North American railroads seeking a cost-effective alternative to purchasing new AC-traction locomotives outright. The rebuild program began in earnest in September 2015, with Norfolk Southern becoming the defining customer of the type after receiving its first rebuilt units toward the end of that year. The economic rationale was compelling: converting existing Dash 9 cores into modern AC-traction locomotives cost only roughly half to three-fifths the price of acquiring brand-new equipment, while Wabtec reported substantial gains in fuel efficiency, reliability, and tractive capability compared to the original DC-traction predecessors. Norfolk Southern grew into the largest single operator of the AC44C6M, with more than 600 units rebuilt as of 2022 and plans for several hundred additional conversions extending through 2025. The railroad drew its rebuild candidates from its sizable fleet of Dash 9-40C and Dash 9-40CW locomotives, with ambitions to eventually convert all remaining Dash 9-40CW units to the AC44C6M standard. Other operators have included Canadian National, which placed an initial order for 50 units delivered starting in October 2022 and subsequently expanded its commitment to more than 120 locomotives, and the Quebec North Shore and Labrador Railway, which acquired 19 examples rebuilt from former BNSF Dash 9 units. Fortescue, the Australian iron ore mining company, operates approximately 28 AC44C6Ms featuring enlarged radiators suited to the demanding thermal environment of Western Australia. Union Pacific and CSX have also announced or pursued rebuild programs involving Dash 9 fleets, though Union Pacific classifies its rebuilt units under its own C44ACM designation. The AC44C6M program represents a broader industry trend toward life-extension rebuilding rather than wholesale fleet replacement, allowing railroads to modernize traction technology and onboard systems while avoiding the full capital expenditure of new construction. The rebuilds are performed not only by GE and its successor Wabtec but also by American Motive Power and, notably, by Norfolk Southern's own Juniata and Roanoke shops, making it one of the few modern locomotive types built in significant numbers by railroad-owned facilities.

Model Train Manufacturers

Brands that produce GE AC44C6M in HO scale

Prototype Reference

Real-world information about this equipment type