What did the bad rear end sound like. I have a wop wop wop sound as I am rollimg around 35-40 MPH. Seems to become quieter when I get up speed 70-90 mph but hear it when I brake down to the slow speeds again. If it is the differential will Chysler fix it under the 7year/70000 mile drive train warranty .. I am third owner but she only has 37000 miles on her 2004 coup body. Could it be a bad wheel bearing? Have some kind of rather new off brand "Kohoo" tires on it. Directional rotation.