Every once in awhile over a washboard section of road with my 2005 LX470 115k miles and the suspension set at the middle setting I sometimes get a bounce/vibration coming from the front wheel that is traveling over that section on another day on the same section I don't get that bounce/vibration feel. I've reset too the sport setting most solid setting and now have not gotten this vibration. Just noted this the last 500 miles. Had front wheel bearings repacked 7k miles ago and new brakes at that time. LX has been serviced by the book always by Lexus qualified tech. It's been in the 100 degree temps in Vegas don't know it this could affect anything. All fluid levels normal and checked every fueling. Any ideas? Any more info needed for a good analysis? I'm do for oil/filter and tire rotation in the next month. Figure I will also have the tires rebalanced in case one of the front ones fell out of balance.