How to add DCC to athearn RTR gp40-2

Model Railroader Electronics and DCC
1

What sound decoder have you had secses with installing and running on a athearn RTR gp40-2. The one I’m talking about DOES NOT have the quick plug.

2

Soundtraxx LC, QSI Revolution, Digitrax SFX and LokSound decoders. All with success.

David B

3

Make sure the motor is isolated from the frame. Because it’s rtr doesn’t mean a thing. If you don’t see 2 wires going from each truck to the lightboard and motor it means the motor is most likely grounded to the frame.