As I back up every once in awhile, something towards the rear squeaks, it definatly is on the drivers side but I dont kno about the passenger side bc I cant stick my head out the window over there. But what happens is as I back up it will squeak then stop for about 1/2 tire rotation then start up then stop for another 1/2 roation. I got under the KJ to see if there was anything hitting the tire or if anything was even loose. But my brakes were dirty, so I cleaned them off, and no they arent squeaky clean

. But over all could it possilby be that something is on my disk brakes and as it goes through the caliper something is rubbing? any thoughts?