I just had all 4 rotors and brake pads replaced on my 1998 S70and drove about 200 miles on them, theymake a little noise butI don't really care. Recently though I've startedhearing a really loud grinding noise that sounds like its coming from under my car somewherebehind the passenger seat. I checked under my car... nothing is hanging or even looks like its loose. The sound I'm hearing is extremely loud and sounds like the car is actually dragging on the ground. Seems to happen randomly while driving,even when I'm not using the brakes. Anyone ever run into this before?

 

That is strange. I would have the suspension checked.

 

On my 850 I had the heat shield come loose once, that rattled around just about like you're describing, I'd assume they'd be in the same spot on the S70.

 

wheel bearing would be a good start, in my opinion.