Wheel Joint 2D, wheels moving strangely when in speed

I want to move my car in a hill climb game but when the car moves fast the wheels start to bounce. I am moving the wheels through arrow keys.
Here is the visual representation of the behaviour of wheels: Video
This is my Inspector for wheel joint :

Code (CSharp):

1.  
2.     public Rigidbody2D carController;
3.     public Rigidbody2D backTire;
4.     public Rigidbody2D frontTire;
5.     public float speed;
6.     public float carTorque = 10;
7.     public float fuel = 1;
8.     public float fuelConsumption = 0.1f;
9.  
10.     public Image fuelImage;
11.     private float movement;
12.  
13.     // Update is called once per frame
14.     void Update()
15.     {
16.         //To get inputs from keyboard
17.         movement = Input.GetAxis("Horizontal");
18.         fuelImage.fillAmount = fuel;
19.     }
20.     private void FixedUpdate()
21.     {
22.         //&& -movement * speed * Time.fixedDeltaTime<1.8 && -movement * speed * Time.fixedDeltaTime>-1.8
23.         if (fuel > 0)
24.         {
25.             //Rotate the tires based on inputs
26.             backTire.AddTorque(-movement * speed * Time.fixedDeltaTime);
27.             frontTire.AddTorque(-movement * speed * Time.fixedDeltaTime);
28.          
29.             carController.AddTorque(-movement * carTorque * Time.fixedDeltaTime);
30.             print(movement);
31.         }
32.         fuel -= fuelConsumption * Mathf.Abs(movement) * Time.fixedDeltaTime;
33.     }

 

Hi,
I had a simular problem, and I found out the problem isn´t in the code, but in the wheel joint 2D. You just have to set the damping ratio to zero and the frequency as high as you need. It´s still "wobbling", but so tiny you almost can´t even see. Hope I could help.