Yesterday night I drove out to my brothers house in L.A which is about 15-20 minutes from here. I was parking my car in front of his house and as I was going Reverse I hear this Noise kinda sounded like metal touching or rubbing coming from the right back end of my car. It was wierd cuz i never heard this before. I chilled there for about 3 hours then i went home. The drive home was fine, But as i got to the front of my house there it goes again, it feels as if it comes after 20 minutes of driving and when i Reverse and Also when i turn slightly, like when im parking. I got no idea what this problem is. It also does it as i go foward slowly. Any Help? Somone suggested to check my U-Joints.