I was putting in some springs today move the brake rotor here and there once I was done I drove around to see if everything was fine. As I was reversing it felt like I hit a rock or something kept on going same thing again weird cuz my driveway had no rocks. So I got out to the main road and the car will start to vibrate make some noises this only happens when I'm in gear, and when I put it in neutral or change gears everything is as smooth as it should be. Anybody know the problem?