Chaos Vehicle Trouble

I am having the hardest time figuring out how to properly set up a chaos vehicle. I have re-rigged and re-exported. Gone through many tutorials. I can’t find any good debug tools to figure this one on my own. Would anyone have any direction for me?

Back wheels do not remain forward. They spin like a gimble. The car almost appears to have a sphere collision in its center, but there is nothing like that in the blueprint or my physics asset. I am at a loss.