My exhaust hanger broke so I went to a shop and got it rehung. They did not have the factory type of hanger. The stock hanger was a rubber hanger. I imagine so it could raddled and wobble around a little separate from the car. The hangers they put on were just universal metal hangers. Gives it no wobble room. After I got it done I started hearing a loud, vibration sound. Sounds like it's coming from the engine compartment. The new hangers are in back by the muffler. is the vibration from the exhaust since it's now solid and it's the sound of the metal trying to move and it can't?