1988 Mercury Colony Park - 302 engine/AOD transmission -
Found a vacuum leak right above my brake pedal, I have no idea what these hoses go to and what they do (although I assume its associated with the brake booster.)
The hissing fluctuates a little whenever I shift to Drive or overdrive, the hissing then dissipates whenever I step on the gas and builds back up when throttle is released.
I removed the black vacuum line as pointed out in the pic, the then stops. I'm guessing there is a crack in the white half ring the lines hook up to. Also im not sure if there is a third line im not seeing that could be unhooked.