How do I setup a vehicle on a round planet?

I have tried to follow a few tutorials on line UE4 - Planet Explorer Game Part 3 - Planet Gravity & First Person Character - YouTube and Stardust HD in Blueprints - Unreal Engine - YouTube

Yet I was not able to take what is done with the twinStick scene and apply it to a vehicle and retain the physics of the vehicles (suspension etc…) Any help would be great. So radial gravity for a vehicle. either I keep the vehicle on top of the world and the world rotates with the motion of the front tires and direction of those tires. Or the car is allowed to move around and can go anywhere and keep dampers, suspension etc… intact

Thanks