Rigid Body Help

I have this Robot I made (rigged and everything) and the tires roll and it’s ready for animation except one part: the wagon. If i animated it as is, the plainness and obviously animated and not simulation because it would look fake, but everytime I add rigid body and try to simulate the turning of the wagon, it becomes unconnected with the mesh no matter the settings. Please help!


I have forgotten now but there is a tutorial on youtube about simulating chains, i think this should help.