Is your ABS light on? These cars have a known issue with the ABS/Traction control module failing. As far as the grinding, do you think it is the brakes? If not, then I suspect one of your wheel bearings as failed.
ABS light not on. Grinding occurs when one wheel starts to slip. When STC switch is off only one wheel spins with no grinding. Do not feel any play in the bearings
Search Volvo V70 Questions
Volvo V70 Experts