Can someone post a pic of what you're talking about? It's been so long since I disassembled my Jimmy that I have forgotten a lot of the little things. Are you talking about the sissor like arms on the top of the barn doors?
Thanks, azcornman
Can't post a pic, but in the pivot of that arm, there is a rubber bumper that will touch the top of the door jamb when the door closes. This rubber protects it from damage.