i bought a used Burlington Northern (Bachmann)  from a  stall at an exhibition for my son.
When i took it home and ran it,it sounded as if it was running on the sleepers and not the track.I took it to my local model club and they said to get a hold of a service sheet for a gear wheel.
Ive been on the web but cant find it,so i called Bachmann and they asked for the model number on the side of the box,but i dont have it.
Help please