Pre-Order | Next Shipment March 2023
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HO RTR SD40-2 with DCC & T2 Sound, NS #3280

Item No.
Athearn - ATH72179
Pre-Order | Next Shipment March 2023
Brand Logo
4.8 out of 5 Customer Rating

HO RTR SD40-2 with DCC & T2 Sound, NS #3280

Item No.
Athearn - ATH72179
Product $259.99
Add Ons
Estimated Total: $259.99

HO RTR SD40-2 with DCC & T2 Sound, NS #3280

Item No.
Athearn - ATH72179
4.8 out of 5 Customer Rating
Product $259.99
Add Ons
Estimated Total: $259.99
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Product Details


  • Former SOU units
  • Nathan P5 horn on each end
  • Bell mounted on long hood
  • Walkway lights
  • “Breakaway” style end handrails
  • Long hood-forward operation

After the 1982 SOU-NW merger into Norfolk Southern, the SD40-2 remained a principle mainline locomotive for the road. Early repaints did not feature white delineators on the frames, and many units lasted this way through the 2000s. They could be found on all types of NS freight movements, and they also had a penchant for showing up on Southern Pacific trains in the late 80s and early 90s.




“SOU” on cab. Two “Firecracker” antennas


“AGS” on cab. Three “Firecracker” antennas


“SOU” on cab. Six “Firecracker” antennas (for Locotrol equipment)



  • Fully-assembled and ready-to-run
  • DCC-ready features Quick Plug™ plug-and-play technology with 21-pin NEM connector
  • Scaled from prototype resources including drawings, field measurements, photographs, and more
  • Accurately –painted and –printed paint schemes
  • Coupler cut levers
  • Flexible rubber MU hoses for durability
  • Flexible rubber trainline hose
  • See-through cab windows
  • Fine-scale Celcon handrails for scale appearance
  • Photo-etch stainless steel windshield wipers
  • Wire grab irons
  • Detailed fuel tank with fuel fillers, fuel gauges, & breather pipes
  • Separately applied air tanks
  • DCC-ready Non-sound version features 21-pin NEM DCC plug
  • See-through dynamic brake and radiator fans
  • Exhaust stack
  • Frame mounted bell (unless noted)
  • Detailed 4000 gallon fuel tank (unless different capacity is noted)
  • McHenry® scale knuckle couplers - Kadee compatible
  • All-wheel drive with precision gears for smooth & quiet operation
  • All-wheel electrical pickup provides reliable current flow
  • Wheels with RP25 contours operate on all popular brands of track
  • Bi-directional LED lighting for realistic appearance
  • Heavy die-cast frame for greater traction and more pulling power
  • Packaging securely holds model for safe storage
  • Warranty service available
  • Minimum radius: 18” Recommended radius 22”


  • Dual cube speakers
  • Onboard DCC+Sound models have full-feature Tsunami2 sound decoder by SoundTraxx
  • Sound units operate in both DC and DCC
  • Full DCC functions available when operated in DCC mode
  • Engine, horn, and bell sounds work in DC
  • All functions NMRA compatible in DCC mode
  • Precision slow speed control


The SD40-2 was introduced in January 1972 as part of EMD’s Dash 2 series, responding to competing products from GE and ALCO. Reliability and versatility of the 3,000-horsepower SD40-2 made it the best-selling model in EMD’s history and the standard of the industry for several decades after its introduction. The SD40-2 was an improvement over the SD40, with modular electronic control systems like those of the experimental SD45X and DDA40X. The last SD40-2 delivered to a United States railroad was built in July 1984, with production continuing for railroads in Canada until 1988.

Product Specifications

DCC Equipped
Axles 6
Prototype Manufacturer EMD
Lighted LED
Sound Tsunami2