save wheel Collider suspensionSpring targetPosition value

Hi i Want to save save wheelCollider suspensionSpring targetPosition value with regards to (CarID) please help me using System.Collections; using UnityEngine.UI; public class Fanar_setting : MonoBehaviour {

     public float FrontV, RearV;
     public Slider Fslide,Lslide;
     public int CarID;
     public _ImportFanar fanar;
 
 
     void Update(){
         CarID = PlayerPrefs.GetInt ("CarId");
         fanar = FindObjectOfType<_ImportFanar> ();
         FrontV = PlayerPrefs.GetFloat ("Fanar" + CarID.ToString ());
         RearV = PlayerPrefs.GetFloat ("Fanar2" + CarID.ToString ());
     }
     public void Front(){
         FrontV = Fslide.value;
         JointSpring suspensionSpring = new JointSpring ();
         suspensionSpring.spring = 35000f;
         suspensionSpring.damper = 1500F;
         suspensionSpring.targetPosition = FrontV;
         fanar.FL.suspensionSpring = suspensionSpring;
         fanar.FR.suspensionSpring = suspensionSpring;
         PlayerPrefs.SetFloat ("Fanar" + CarID.ToString (), FrontV);
     }
     public void Rear(){
         RearV = Lslide.value;
         JointSpring suspensionSpring = new JointSpring ();
         suspensionSpring.spring = 35000f;
         suspensionSpring.damper = 1500F;
         suspensionSpring.targetPosition = RearV;
         fanar.RL.suspensionSpring = suspensionSpring;
         fanar.RR.suspensionSpring = suspensionSpring;
         PlayerPrefs.SetFloat ("Fanar2" + CarID.ToString (), RearV);
     }
 
 }