Drum Brake? or Disk?
If the pad/shoe is rubbing different on the rotation, then something is not in alignment or possibly, something is possibly pinching something to make it out of round.
If its drum, did you clean out the inside of the drum? I have seen where junk built up on the inside and not cleaning it out well, left a build up on the inside of the drum. Cause its drum brakes, you can't see it unless you pull it apart to look.
If its disk, pull the pads off and check the rotation and that should tell you if its brakes or something else.