I just got a new to me '04. 5 and the rear seat on the passenger side (the larger portion of it) will not fold all the way up. It did when I first got the truck, but now will only go about 1/3 of the way up and then acts like it hits something or is locked. Has anyone else had this happen or know what to do about it? I've poked around on the hinges and can't find anything that looks like it's keeping the seat from working properly. Any suggestions are appreciated.