How certain are you that it's the CV joint and not just and not just the tie rod end? From What I hear they have similar symptoms. I was hearing some sounds from my front end a few months ago and asked a mechanic buddy if he had any ideas. He told me to jack your car up and shake the wheel, side play (rocking) is a tie-rod end, up and and down play (rocking) is a wheel bearing, or it could just be a bad CV.