Athearn - Item No. ATH98542
4 out of 5 Customer Rating

HO Sound Ready Underframe, SD40/45

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Three benefits to Genesis power to your RTR Locomotives:

  • Streamlined DCC speed curves
  • Lower motor current draw
  • Quieter motor operation for DCC Sound


  • Earlier models that don't have the Sound Ready starburst on the box will require this underframe in order to use the Genesis Motor Retrofit Kit (ATHG63839) available separately.
  • Simple Installation
  • Includes all weights
  • Included mounting screws
  • Integrated speaker box
This updated frame will ONLY work with locomotives produced from 2011 to present day. If item will be used with a locomotive that was produced before 2011, modification will be necessary.