Single wheel Vehicle

I’m making a tank-combat game. My tank looks like this:

I’ve made attempt to make tank physics with rolling-ball BP, but the satellite-meshes (tower, guns) are chaotically trembling while the ball is rolling. So I’ve came up with a 3rd person BP, where ball is just rolling based on character speed. But there is no physics though.

Is there a way to get nice physical movement of a ball and neat movement of attached meshes?
Thanks. Any suggestions are welcome!