Hello,firstly thank you everyone for all their information with everything. So I have a postwar 682, the linkage going to the car body and wheels was bent, so ordered all the original parts and took it to a shop. They fixed it and got it back, it functions great but grinds and derails the front wheels, has anyone had this issue before. Because the guy who had it prior rigged it with something that wasn't factory Lionel components to make it work. So now I'm worried that his modification was done because it would in fact detail it while it was running. So has anyone dealt with an issue of their 682 linkage hitting the front wheels and derailing them. Thanks for the information guys. Don't know if I should take it back to the shop. Or just try to figure it out because he placed it back to stock.