HO AC4400CW Locomotive Union Pacific #5555 (ATHG-2041)

HO-scale GE AC4400CW diesel locomotive in Union Pacific livery, road number 5555, from Athearn’s Genesis line. This highly detailed model is built to bring modern power to HO layouts, featuring prototype-accurate paint schemes, LED lighting with illuminated number boards and ground lights, and illuminated front and rear walkway lights. See-through cab windows reveal a full cab interior, while etched walkways, fine-scale handrails, and flexible hoses enhance realism. The Genesis driveline uses a 5-pole skew-wound motor, precision flywheels, and a multi-link drivetrain for smooth, quiet operation, all supported by a heavy die-cast frame and a DCC-ready platform with Quick Plug 21-pin NEM connector. It rides on RP25 wheels and uses McHenry scale knuckle couplers, with a minimum radius of 18 inches (22 inches recommended) for reliable performance on typical HO track.

Road-name specific variations cover UP, CP, FSRR, NS, CEFX, BNSF, and GECX, including UP’s as-delivered scheme with hi-mounted number boards and a large GPS dome. Sound-equipped versions add onboard DCC with SoundTraxx Tsunami2, dual cube speakers, and full DCC functionality, while many functions remain active in DC operation and a CV chart is included for tuning and lashups. A “Primed for grime” option provides a ready-made weathered look for an In-Service appearance and a solid platform for custom weathering, all designed to deliver durable, realistic operation on modern HO layouts.