I would like to animate the filling of a moving object.  I can animate the filling of the object but I cannot animate the moving of the object while filling is occurring.  Is there anyway to do this.  I have attached the model I have been experimenting with.  If you run the motion study you will see the wagon filling to a choke point and then the rest of the wagon being filled.  What I also want to show is the wagon moving from right to left while the filling is occurring.

Thanks,

Jason