Car Controller Issue

Hey guys, I've recently wanted to try to make a racing game. I've written up this little script here:

Code (CSharp):

1. using UnityEngine;
2.  
3. public class CarController : MonoBehaviour
4. {
5.     public WheelCollider frontLeftWheel;
6.     public WheelCollider frontRightWheel;
7.     public WheelCollider rearLeftWheel;
8.     public WheelCollider rearRightWheel;
9.  
10.     public Transform visualFrontLeftTire;
11.     public Transform visualFrontRightTire;
12.     public Transform visualRearLeftTire;
13.     public Transform visualRearRightTire;
14.  
15.     public float motorForce = 10f;
16.     public float steerForce = 10f;
17.  
18.     private void Update()
19.     {
20.         float motor = Input.GetAxis("Vertical") * motorForce;
21.         float steer = Input.GetAxis("Horizontal") * steerForce;
22.  
23.         // Apply motor force to both rear wheels
24.         rearLeftWheel.motorTorque = motor;
25.         rearRightWheel.motorTorque = motor;
26.  
27.         // Apply steering force to front wheels
28.         frontLeftWheel.steerAngle = steer;
29.         frontRightWheel.steerAngle = steer;
30.  
31.         // Rotate visual tires based on wheel collider rotation
32.         RotateTire(visualFrontLeftTire, frontLeftWheel);
33.         RotateTire(visualFrontRightTire, frontRightWheel);
34.         RotateTire(visualRearLeftTire, rearLeftWheel);
35.         RotateTire(visualRearRightTire, rearRightWheel);
36.     }
37.  
38.     // Helper function to rotate visual tires
39.     private void RotateTire(Transform visualTire, WheelCollider wheelCollider)
40.     {
41.         Vector3 position;
42.         Quaternion rotation;
43.         wheelCollider.GetWorldPose(out position, out rotation);
44.         visualTire.position = position;
45.         visualTire.rotation = rotation;
46.     }
47. }
48.  

When I attempt to run this it makes the wheels fall in a horizontal position forever. What seems to be the problem?

 

Try to set the car higher above the ground, and let it fall on it. If still a problem repeat confirm that you have a proper collider around the wheels (there is a special wheel collider).