Hi Wayne,

I got your file, opened it and will look at it today.

It would be helpful if you also put the file 700T-1013.x_t into the Google Drive and send me a link to that so I can make geometry edits that will help the simulation.

One idea is to create an Axisymmetric model of the air spring assembly.  That will only be useful if you are only interested in axisymmetric loads. It will not be useful if you want to tilt one side relative to the other.