I'm working on the front brakes for a 2009 Jeep Wrangler, the driver side specifically, and it appears the caliper mount bracket has been contacting the rotor for some time. After disassembling everything and checking it out, the cast mounting ears on the knuckle don't appear to be square to the rotor; that is to say the distance between the rotor and the two caliper bracket mount ears on the knuckle are approximately 1/8" different... I've never had this issue before, so I don't know if this is common or not, but has anyone ever run into this? Is it acceptable to run a shim of some sort to even out this distance and help keep the caliper bracket square to the rotor? I don't see any signs of obvious damage to tweaking of the knuckle mounting ears, so I'm chalking it up to manufacturing tolerances, but ????