I have a 2005 Toyota Sienna. First symptom was a shimmy that came and went, but is mostly there now, we've basically stopped driving it for now because of that. A couple weeks ago my wife drove it a couple miles and a wheel would seem to stick a little, then come loose and drive fine. There was a faint burning smell when they got back. Today I drove it to try to figure out what might be happening. At first it drove fine. Then the shimmy came back and when driving it slow there would be resistance at certain points in the tire rotation.

I jacked up the front and there's about a half inch rotation in the front passenger side wheel. The driver's side doesn't budge.

All this says to me that it's a bad bearing, however, there's no noise, which you would think there would be with a bad bearing. Any thoughts?