ever since I did rear brakes, which required new parking shoes and hardware, I haven't been able to get the parking brakes to adjust well. think I need to get under it and floggle the star wheels some more, I guess. I do the roll-back-and-yank-the-brake trick a couple times, and it seems to work once or twice, but it won't keep the jeep from rolling forward, and after that they loosen up again. Only thing I can think of is the cables can't ratchet tension enough at the handle, and I don't know how to loosen that part as well.
You have to do that a few times a day for a few weeks lol. At least that's what did it on mine. I use mine every time I park it, even let it roll back onto it a bit if possible.