High pitch rear squeal at low speeds...2003 Explorer. I have replace the front hubs and rear left side hubs. Recently, replaced the right rear wheel bearing, squealing noise is still there. Any advice?

 

take off the rear calipers and disc and look at the emergency brake shoes.

 

Thanks Steve: However, upon further investigation the noise appears to be coming from the front right wheel; hub assembly was changed about two months ago. What baffles me is why would the replacement of the right wheel bearing now cause the front right wheel noise?