Hello all, I have a 2005 pt cruiser, about two weeks ago I started hearing a loud sound and vibration towards the back of the car when I start going over 40km (sounds like a race car, kinda). So I took it to a shop, asked them to check out the muffler and see if there was anything wrong. They said no the muffler is fine but the watts linkage needs to be replaced. So I had the watts linkage replaced and when leaving the shop I still had the same problem. This problem only happens when the car is moving, has anyone ever had this problem before?