Hate to tell you this, but it ain't magic...
You think something is rubbing? Ok, jack up the Jeep, get a flashlight and start looking. Turn the tires, work the brakes, see what's going on. Take the tires and brake drums off, take a look. I can't see how air in the brake lines would cause a vibration. And bleeding brakes isn't tricky. If you had problems, you were doing it wrong. Figure out (read) how to do it correctly. Welcome to Auto Repair 101.
Oh, and don't step on the brakes while the drums are off!
The road goes on forever, the party never ends....