hello i have a 1996 328i that ive had for about a year and its been great (besides some replacement) but recently im hearing this terrible almost like grinding sound coming from the rear end? ive been around cars but i have to say ive never hear this one i looked under briefly but havent had a...

I have a 1989 325i with 170,000 miles on it, when I go faster than 40mph I can hear noise coming from the back of the car. When I hear the noise the car doesn't begin to shake. Any ideas what would cause this?

2000 Z3 rumble in rear during hard acceleration & shakes in front at speeds over 50 2000 Z3 with 100,000 miles rumbles in rear during normal to hard acceleration (1st & 2nd gear) & shakes in front at speeds over 50. Two completely unrelated problems and I need advise on where to go before I...