I just bought a 2008 Dodge Caliber used from a dealer I’ve noticed when I accelerate I heard a loud scrape sound.... kind of how a muffler would sound scraping against cement....You can also hear the sound Randomly while the car Is at rest and when you first start it up. I’ve checked underneath the hood and the sound does not seem to be coming from there and the dealer put in all new brakes before I bought the car. Has anyone else experienced this ? Or know possible what it could be ? I also have to push a bit harder on the gas to have it move.