Hello everybody. I am new to this game. Here goes. I have an M818 that I think has the fifth wheel off an M819. I think this because the release is a long bar not a normal pull handle. THe pictures in TM 9-2320-260-34-2 for the 819 look more like the hitch on my truck. My question is this. Is there a source for repair parts for these or does anybody know the brand and model used? The problem is the jaws in mine are not level and they are kind of loose in there. They don't buckle up like they should. By the way, is it strange that the fifth wheels could get mixed from one truck to another? THanks