Vehicle Script

var Wheelfr : WheelCollider;
var Wheelfl : WheelCollider;
var Wheelrr : WheelCollider;
var Wheelrl : WheelCollider;
var Speed = 15;
var Braking = 25;
var Turning = 25;
function Update () {
Wheelrr.motorTorque = Input.GetAxis("Vertical") * Speed;
Wheelrl.motorTorque = Input.GetAxis("Vertical") * Speed;
Wheelrr.brakeTorque = 0;
Wheelrl.brakeTorque = 0;
Wheelfl.steerAngle = Input.GetAxis("Horizontal") * Turning;
Wheelfr.steerAngle = Input.GetAxis("Horizontal") * Turning;
if (Input.GetKey(KeyCode.Space))
{
    Wheelrl.brakeTorque = Braking;
    Wheelrr.brakeTorque = Braking;
}
}