2006 Sonata V6. Front brakes only squeal when applying them while in reverse. Happens all the time......cold/warm start, cool/hot weather, dry/humid air. Squeal is extremely loud. I have searched and found similar but nothing exactly like this. Pads and rotors are fairly new and I have removed them and reinstalled and regreased twice. Any suggestions? I am using ceramic pads and have never used them before. Is this common with them? Thanks for any advice.