My truck remain in air position not change.Truck has rigidbody with 15500 mass gravity enabled while wheels have wheel colliders

when my truck from mountain enters road its some part remain in air how to fix that

I’m curious why you tagged this 2D-physics, looks 3D to me.

OOps i selected this by mistake

please help me to resolve my issue i am facing while making game

I’ve changed the tag for you so it gets put into the correct product area. Hopefully someone can advise you.

I’d say though that you need to provide more information on the setup beyond a brief description in the title i.e. the components, their configuration etc.