So while deployed my wife took my 07 JK to have all the new parts installed (on the rear Axle new Gears, Nitro Chromoly Axles and ARB Locker.) When she got it back the left rear brake or something in that area is squealing/Grinding. I checked my actual brake pads and them look fine. I do notice that when driving at slow speeds if I engage my parking brake just a little it goes away. Does anyone have suggestions, this noise is driving me crazy.

 

You need to pull your calipers and rotors to check the ebrake shoes behind the rotor. They may have not been seated properly by the shop or return to the shop to have them fix it.