Originally Posted by Frango100
Did you check if there was something stuck in the tire thread? The fact that the intermittent noise is speed related, reduces the possibilities to something rotating.
Good change that the caliper has a slight leak at the piston seal or the brake line connection, it would be bad luck if the axle seal already leaks after so few miles.
Did you lubricate the caliper sliding pins before? Not doing that can cause the caliper to stick and finally seize.
I did grease the caliper pins last time I changed the rear brakes.
As I was driving the car home (almost 40 miles at highway speeds) the sound changed from a rubber sound to a slight metallic noise. I got the wheel, caliper, and rotor pulled off. Looked around at the caliper and it doesn't appear to be leaking, just has oil on it. The leak is definitely coming from the rear axle seal. I checked the log book and I changed it in April 2012. It only lasted 2 years and 40k miles.
With all that off I looked around. The bearing is definitely bad. I can feel and hear it's bad when I turn it by hand. I also noticed that my rear a-arm bushings are completely shot. The driver's side bushing give about 1" of vertical play when I push it by hand. The passenger's side bushing doesn't give any measurable play, but I can move it up/down a little by hand. Last night I managed to get the bushing bolts removed and loosened all the ball joint bolts. Figure I'll take it out, sand blast it, paint it, and replace the bushings/ball joint.
There was a a-arm bushing thread here not long ago. Was the consensus to use Dorman bushings? Then I'll pick up a Moog ball joint and call it a day. Then I'll take the axle and a-arm to the shop to have them press everything in place.