Help! I bought a Accucraft Shay at the end of last summer and ran it around a temporary track on the driveway for about a month without any percieved problems. Today I was invited to a steam up and noticed that my Shay was making a "clunking" sound under power on a elevated track. I disconnected both trucks and both are free to turn. I also noticed that there seems to be some binding to go along with the clunking. Has anyone else had a similar problem and any thoughts on a fix. Thanks.