On the woman's car there has been a subtle vibration and an increasing noise. I guess grinding probably isn't the correct word but it sounds like metal knocking on metal. The car is a 97 with 109k on the clock. The noise increases with ground speed not engine speed. Also if you turn slightly to the right the noise ceases. I am thinking that it is probably a CV joint, but to be honest i don't know much about these cars. Trucks are my thing. I am just looking for some advice and/or ideas before I start tearing it a part.