The the last 2-3 years I have been experiencing an intermittent vibration in the rear end of my Odyssey, particularly at low speeds. I first noticed this while driving into my neighborhood at about 25 mph when doing a gradual left hand turn. I then noticed the vibration happening at other random locations at low speed. It feels like the real wheels are bouncing or skipping and the whole vehicle shudders. I checked the balance of my tires, I had the vehicle aligned twice at different shops, and I've installed new tires. When I have taken the vehicle to a reputable local shop (non-Honda dealer) we have been unable to recreate the problem during test drives. The shop inspected the suspension and said everything looked good. The new tires appeared to solve the problem at first, but within a few days I started experiencing the same problem. Now the problem is getting worse, but I'm hesitent to take the van into a Honda dealer where I will likely end up spending a lot of money without a solution. Has anyone experienced this or have any ideas of what might be causing the problem?