From what it sounds like , Vlad has the right idea..
From the engine compartment, look behind the engine, on the firewall, there's a black tube about the size that Vlad described. Squeeze the tapered end with your fingers and see if it's packed with debris on that tapered area, if it is, Cut off the tapered end to prevent this from happening in the future..One word of advise thou, find the Transmission vent tube and the T.case Vent tube.. If for some reason it's routed to the center top of the bell housing, you must re-route these tubes on a higher location away from the path of where the cowl drain is at, otherwise it will be like sticking a water hose into the vent tubes and filling the Trans. and T.case with water.