Unity WheelCollider falling through everything

Question

I'm building a 3D car game by using Unity 3D, there are four wheels inside my 3d car model, I created 4 empty gameObjects , put them in the car gameobject and thier position are match with per wheel I added a wheel collider inside each of them but when I ran the game, my car fallig through the terrain. Anyone tell me why?

Answer 1

1:make sure your gameObjects is add collider with another objects 2:check your GOS position in u3d

ps: if you can show the pic on your question , that would be good for your question!!