the rear wheels on the rear truck keep comeing derailed around curves the curves are not to tight . If i run the loco by itself it is ok but when i put cars behind it the rear truck derails.???? is there any help????
Try running it the other direction and see what happens and maybe add some wieght to the car.
I have that problem with passeger coaches. I have relaid the track a few times but now I just run the train in the other direction and it stays on the track.
My idea is that the truck isn't sitting level, lifting the rear wheels just enough to derail. Also, if the front wheels do not roll extremely smooth, it could bind enough to give a bit of resistance and lift the rear wheels, or take weight off them enough to easily derail.
