So I've had this loud rattling noise from under my car for a couple months now.. Sometimes its super loud and embarressing I've found that if i jerk the steering the noise will stop, for a little bit.. Anyways i've had the car at three shops, none of which could figure out whats causing this noise. We have a friend who is a mechanic but always super busy with his own job and family.. but last night he generously took time out and investigated our car! At first we were leading to 'strut bearings' (im not so good with the car talk, just telling what i can remember, lol) But then after an hour he's under the car and hitting something and my husband and I looked at each other and shouted 'thats the noise"! He was hitting on 'ball bearings' in/or near the drive train.. anyways i guess theres two sets of these ball bearings (front & back) and the front is heavily worn out and he reckons the back ones look like they're about to go too He explained most of this stuff to my husband which is useless cause he's not the one going to look for parts or take it to the shop and explain what needs done.. So im wondering if someone here can tell me if what i said makes sense, or better explain to me (simply) what i might say to the volvo guy, also tell me exactly what parts i need to buy.. i heard our friend say something about if able to get a 'dry shaft' would be easier just replacing the whole one part.. Thanks guys!