I looked at the Lionel 6-28539, and I don't see any VCO or axle switch, so I don't know as they have any way of actually telling the sound system they're moving or not. RailSounds 4 didn't have automatic management of the prime mover rev, and they required an external trigger and inputs from the throttle to give them input. I think if you leave it long enough sitting still, it'll may come back to idle.
|