This locomotive was powered by an Alco 539 turbocharged 6 cylinder diesel engine and the S4 has standard AAR type A switcher trucks

The Trainz SKU for this item is P11384145

Model Number: 18142

Model Number: 708

Bachmann 60304 HO Santa Fe EMD GP40 Diesel Locomotive DCC #3508 ProductID_11403691 This locomotive was powered byThis is Bachmann 60304 HO Santa Fe EMD GP40 Diesel Locomotive w DCC #3508. With these easy to use and affordable locomotives, you can digitally control speed, lighting, and direction. Compatible with all NMRA compliant DCC systems. 8 wheel drive. Works best on 18 radius curves or greater, with prototypical blue and yellow War Bonnet painting. Condition: Factory New (C 9) Operational Status: Functional Original Box: Yes (P 9) Manufacturer: Bachmann