I have noticed when going up a hill with a slight corner at the crest, at speed, it feels as if one rear wheel is leaving the ground and the suspension bottoms out, hits the bump stop. Last time this occurred while in advanced and the slight curve was to the left. I am not sure but I think it always does this with a left turn. I also believe this occurs in comfort and sport. It feels as if it is the right rear is causing the problem. Is this normal?<br>Car has 49000 miles<br>Any advice appreciated.