Hello, I just recently purchased a 2005 SE Magnum. While driving down the highway the car started rattling and shakingreally bad as soon as I slow down it stops. Another problem that happens is that as soon as I hit over 70 mph the car looses power. It does not shut off but no matter how hard you push the petal it does not respond. Also the EPS Bas lite is own and the lighting bolt with the brakets is own. Please help it is my first dodge vehicle and don't know if this is normal for this car