I have had a very slight sound coming from my rear wheels.Just to make sure it was not something I did the following was done.I had the tires balanced,rotated and a wheel aligment.Then I started to change brake pads that did not need replacing(front first).When I started on the rear ones I found the parking brake behind the drum was scraping the drum(never use parking brake)Clean everything up and adjusted the brake all the way in.On the right side there was the same problem but there was greese in that area and the axle had 1/8 " play in it.It is time to go to the dealer,a first at 27 K.Has anyone else heard of this type of problem?