I have a P/S cap with some type of check valve underneath. Does anyone know what it does? Mine is messed up. I can't seem to find a replacement and I'm afraid it will fall into the pump.
That's a gas cap. Do a search for "Mopar Federal Power Steering Pump Cap" Here's a pic of what it should look like. Or if you like the gas cap better, just swap it out for a vented cap.