Hi, I had to replace the slave cylinder on my Ranger. Had to drop the tranny to get to it. In order to drop the tranny, I separated the transfer case from the transmission and when I was got them separated, I noticed a very thin, now mangled washer lying on the driveway. Ford dealership wasn't able to tell me what it was. Their best guess was thrust washer. I don't think it's a thrust washer. It's very thin and completely flat. the thrust washers I've seen in researching this have all been fairly thick and have staggered curved lips on them. I can see a ring around the one bearing retainer nut that may be an indication of where I washer might have been. Does anyone know what this washer is and do I really need it in order to put the transmission and transfer case back together? Any help is appreciated.