The vent is on top of the case, but it runs inside and into the pump, or so I'm told. Hell, I know how to spell transmission, but that's as far as my expertise goes. All in all the 200-4R has been awesome. The way I drive this car it should break every time I drive it. I race on the street and track, I do long burnouts, I do rolling burnouts. It has held up pretty damn well considering what I do to it. I just want the problem to go away and start driving it again. I've hardly driven it this summer. I broke out the Ramcharger so I could go to car shows. Then I bought a 300C SRT8 so I could feed my need for speed. I expect to get the transmission back tomorrow and the flex plate was at my house for delivery but needed a signature. Maybe I'll be able to drive it this weekend if things go well.