mine makes that same sound,,, almost like a low humming noise when you get it going,,,, it could be the studs under the bogies and yes you can do that, it doesnt hurt anything. I have mine under to bogies on both my standard and my sno pro track and I havent tore up any of the rubber on the boggies with them,,,, I would run it and not worry about it,,, it isnt hurting anything,,, by the way, when I switched to the sno pro track, the noise isnt bad at all,,, not nearly as noticeable as it was with the standard track.