My GF had the rear brakes (calipers, rotors and pads) done on my 2001 Jeep Grand Cherokee Laredo. Not sure why they did not notice the cracked lining then, is it a problem? Also they did not adjust the parking brake to the new rotor/drum. So it failed inspection. I took it back and they adjusted it. We left alone the parking brake shoes alone, so lining still has a crack. I know GF had a habit of leaving on the parking break for the first couple of hundred feet until she noticed it. Why the crack?