Has anyone heard or had any problems with rear suspension noise? My passenger rear tire consistently makes a "loose lumber" sound. This happens only when going over slight variances in road conditions (small pumps or ripples) and not when all four tires take a hit from a bump. In other words - it happens pretty much all the time. ITS DRIVING ME CRAZY!! I thought it might be a bad strut or strut bushing but the dealer stated everything looked fine. I'm not sure how much confidence I had in that specific dealer so a second opinion may be necessary. PLEASE advise if you have any insight....