Cadillac Repair: Squelling Right Front Brake, wheel bearing grease, dry seal

Question
Right front brake squeeks continously when driving.  Louder at low speeds, and hardly noticeable at high speeds.  When brakes are applied the squeek silences, but resumes when brakes are released.  Brakes well. While turning left the squeak stops, but resume when car is moving forward.  What do you think this is?  

Answer
Hi Ken, Since the squeaking comes from the RF, I would take off the tire an assess the thickness of the pads to make sure the squeal clip isn't touching the rotor. With some compositions of brake pads called semi-metallic linings there are small particles of metal in the brake material that can cause squeaking and lines will be seen in the rotor as a groove. You don't say the year and model of your vehicle but Cadillac has had problems with brake noise and has changed lining composition to help quiet things down on several models. If you had brakes put on elsewhere it might be worthwhile to go back to Caddy pads or ceramic pads as they tend to be quieter operation. There could be a stone or something caught between the caliper and rotor. The shield could have been pushed or bent into the rotor. The last thing that I have seen is the rubber seal that keeps debris out of the wheel bearing and rides against the axle outter joint will get dry and as the vehicle moves the dry seal squeaks. All that is needed is to loosen the axle nut so you can push back the axle and install some wheel bearing grease on the seal, then tighten the nut back up.

   You could have a combination of things that are makeing the noise so I would have all those things checked out. If the noise can be made with the vehicle up in the air and the wheels turning, then I would support it on quality jackstands and slide underneith while the tires are turning at slow speed to see where the noise is comming from. A mechanics stethoscope or rubber tube to your ear can help zero in on the noise location...just make sure not to get too close to the moveing parts. Let me know if I can be aymore help. Bill