I investigated more before I reinstalled... There seems to be some kind if plastic liner inside and topping the receiving hinge, it's the consistency of a McDonald's straw, a black rubberized plastic. Most of this liner stuff got tore up, only 2 stayed in tact. I have a 2013 rubicon. I bought lithium grease and lathered them up, bit the the the worst hinges didn't want to seat properly. Should I dug the plastic out and go metal on metal? The doors were a bitch to remove because of that lining.