ShakeTransformS.cs

using UnityEngine;
using System.Collections;

public class ShakeTransformS : MonoBehaviour
{
	[Header("Info")]
	private Vector3 _startPos;
	private float _timer;
	private Vector3 _randomPos;

	[Header("Settings")]
	[Range(0f, 2f)]
	public float _time = 0.2f;
	[Range(0f, 2f)]
	public float _distance = 0.1f;
	[Range(0f, 0.1f)]
	public float _delayBetweenShakes = 0f;

	private void Awake()
	{
		_startPos = transform.position;
	}

	private void OnValidate()
	{
		if (_delayBetweenShakes > _time)
			_delayBetweenShakes = _time;
	}

	public void Begin()
	{
		StopAllCoroutines();
		StartCoroutine(Shake());
	}

	private IEnumerator Shake()
	{
		_timer = 0f;

		while (_timer < _time)
		{
			_timer += Time.deltaTime;

			_randomPos = _startPos + (Random.insideUnitSphere * _distance);

			transform.position = _randomPos;

			if (_delayBetweenShakes > 0f)
			{
				yield return new WaitForSeconds(_delayBetweenShakes);
			}
			else
			{
				yield return null;
			}
		}

		transform.position = _startPos;
	}

}

This code is working when I am applying this script onto my car body. But there is a problem. when I press the gas pedal the body remains stationary and the wheels move in the forward direction. Maybe because uneven contact between wheel colliders and box collider (of car body) during the shaky effect of the box collider ... I need a solution for this .. pls help