I've had this clunking sound on the rear-passenger side of my car. I had it checked out by a mechanic through a friend, and when it was first thought to be rear struts, it ended up being a rear differential mount. Since this part has been on "back order" I haven't been able to get it. He said he ordered the front and rear differential mounts. I am curious to know how much you guys have paid for one of these in the past ? I trust you guys more than any one else for prices, etc.. thanks