I noticed this prior to storing my car for winter but never thought anything about it.
However, my 2002Gt has a thumping sound, and it comes from the engine bay. it seems like the passenger side. It happens when i'm coming to a stop, just barely as i stop, and i'm able to feel the brake pedal thump along with it. It also does it intermittently while i'm stopped at a light.
Could this be a misfire or something? My previous mustang had a misfire, and it didn't sound like this. It's starting to irritate me, so what do you guys think this could be?