Athearn HO RTR SD40-2, RI #4791
Athearn HO RTR SD40-2, RI #4791
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Manufacturer: Athearn


  • All-new LED lighting
  • Rubber MU hoses for durability
  • Photo-etched stainless steel windshield wipers


  • Ex-Conrail
  • Front snowplow
  • Late coupler cut levers
  • Large anticlimber
  • Illuminated ditch lights (Effect with horn blown on DCC/sound version)
  • 88" nose with brakewheel
  • Round nose vent on right side
  • Standard late -2 4-window cab without roof seam and louvers
  • Riveted cab side panels
  • Cab signal box
  • Mirrors/wind deflectors fore of windows
  • Oval cab vent on left-side of cab
  • Nathan P3 Air Horn
  • Large Sinclair “ice skate" antenna and two small Sinclair “ice skate" antennas
  • Intermediate -2 battery box door on left-hand side
  • Horizontal split battery box door on right-hand side
  • Welded ECAFB
  • Early extended range dynamic brake
  • Corrugated radiator grilles
  • Standard radiator fans
  • Flexicoil trucks

The NS 3329 is the ex Conrail 6358 the first SD40-2 purchased new by Conrail in June of 1977. Painted into the MAERSK Sealand scheme in the Summer of 2002 for the grand opening of a new MAERSK facility located on Terminal Island in the Port of Los Angeles. NS painted and sent to CA this special painted SD40-2 for ceremonies and photo ops. The locomotive continued on in this scheme until about May 2008 when it was painted back into black.


  • Ex-BNSF low nose, inset mounted headlight
  • Standard range dynamic brake
  • Illuminated ditch lights (Effect with horn blown on DCC/sound version)
  • Spare knuckles on rear pilot
  • Roof mounted A/C
  • Firecracker antenna
  • MU catch trays
  • Brakewheel or ratchet brake per prototype


  • Fire-cracker antenna
  • 81" nose with hand brake
  • Non-dynamic brake hatch
  • EMD low front snowplow
  • 4000 gal fuel tank
  • Five chime air horn

Rock Island bought its first six-motor freight power in 1973 in the form of eighteen U30Cs and ten SD40-2s. Although in poverty, and the Southern Pacific influence began to diminish, the Rock Island initially was luke warm to jumping on board with the SD40-2. Ordering a total of ten units, these locomotives were seen frequently in pool power on the Union Pacific and occasionally on the Southern Pacific too.


  • Large UP style plow
  • 88" nose with brake wheel
  • Illuminated ditch lights
  • Early extended range dynamic brake

On February 27th, 1991 a tribute was paid by the Union Pacific Railroad to the American troops and UP employess serving in the Persian Gulf War. UP #3593, an EMD SD40-2, rolled out of the North Little Rock shops in full desert camouflage dress. Union Pacific railroad employees had repainted the SD40-2 as a symbol of their support for fellow workers called to active duty for the Persian Gulf War. Dedicated less than 12 hours before the cease-fire was announced, it was hailed as "Desert Victory" by UP railroaders. Our SD40-2 is prototypically modeled after UP's 3593, right down to the intricate camouflage patterns.

About the same time, the struggling Southern Pacific, realized the new paint formula used in Sacramento, in order to correspond with strict California EPA regulations, began to peel in an unexpected manner that mimicked desert camouflage. The railfan community dubbed SP #7319, perhaps the worst case of the peeling paint, as SP's "Desert Storm." We are offering both locomotives together.


  • Fully assembled and ready-to-run
  • Separately applied wire grab irons
  • Separately applied air tanks
  • Coupler cut levers
  • Rubber MU hoses
  • Photo-etch stainless steel windshield wipers
  • Fine scale handrails molded in engineering plastic
  • 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)
  • HTC or Flexicoil-C trucks (per prototype)
  • McHenry scale knuckle spring couplers
  • Highly-detailed, injection molded body featuring new tooling
  • Painted and printed for realistic decoration
  • See through cab windows
  • Bi-directional LED lighting
  • All-wheel drive with precision gears for smooth and quiet operation
  • All-wheel electrical pickup
  • 5-pole motor with flywheels and multi-link drivetrain
  • Wheels with RP25 contours operate on all popular brands of track
  • Window packaging for easy viewing
  • Interior plastic blister safely holds the model for convenient storage
  • Minimum radius: 18"
  • Recommended radius: 22"


  • Onboard Econami sound decoder by Soundtraxx
  • Engine startup sound sequence
  • Dynamic brake sound or Non-Dynamic Straight to idle on F4
  • Extra prime mover and horn sounds exclusive to Athearn version
  • Multiple bell sound files user configurable via Configuration Value (CV)
  • 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
  • Excellent Slow speed control
  • Current Keeper ready with on board expansion plug
  • Operating lighting functions with F5 and/or F6
  • Program a multiple unit (MU) lashup with lead unit only horn, bell, and lights
  • Many functions can be altered via CV changes


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 similar to 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.


DCC:Ready/21-Pin NEM
Minimum Age Recommendation:14 years
Is Assembly Required:No

Search Terms: ready to roll, LED, sd-40-2, sd40-2loco, ath_0318, 21pin

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Athearn HO RTR SD40-2, RI #4791 Reviews

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