I own a '96 dodge intrepid. It's been a very reliable car until recently. When I accelerate, the whole car shakes and it sounds like it's coming from the front. When I go down a hill however or let off the gas it doesn't do that. I'm curious as to whether it is the wheel assembly or what. Any ideas? My dad told me I'll be done with my baby if I can't figure out what's wrong with it.