So I'm rebuilding this transmission and I've never done an automatic before. So I figured rather than starting new threads every time I get stuck, I would just start this one and anyone else can dump their dumb question in here too. So here's today's dumb question. I'm mostly through this thing and I took the pump apart. I know the variable pitch pumps have a blow off valve for the cooler in case the lines get jammed. There's what looks like a cup pressed in there and then some kind of spring steel looking thing around the perimeter. My question is whether something else goes in there or if that's all of it. I'm worried that something fell out and I missed it. I can't see any reason for that steel surround to be in there. I've checked several other sources. I've found descriptions but no pictures. Here is a picture of the valve that I'm talking about. Thanks in advance.