I believe you're describing the transmission case air vent - rubber, vanishes into the upper center of the case just where the body flares larger for the TC, loose end usually stuck in a random hole in the frame. No service but you can run a wire up a couple inches to check clear.
If it "seems to be leaking" just taste it to confirm if just trans fluid or something else..
EDIT: Noticed grandpa's post. If coming down right at firewall, then slight chance it's A/C drip. But it would likely be the size of a 1/2" garden hose. If further aft closer to cx-member and the size of a gasline or vacuum hose, then it's tranny vent.
\'96SS SOB: SSRI, Herter Tune, Tri-Y II, , 3000 Edge, F/HO bars, METCO extendeds with CV MMC, Bilsteins, currently Vredestein Ultrac Sessanta (315/35 rear)
\'96FWB BUW-Butt Ugly White: PCMPerformance tune, HomeDepot pipe w/ swissed filter, 1/2 SLP s.s. catback with H- and Flow Super 50s, oem opti rebuilt 3 times, SS Bars, METCO LCAs, Airlift 1000, Monroe SS, PowerTrax No-Slip, and now CTS wheels with +1 rubber. Finally, wait for it... LT-4 knock sensor!
Last edited by 96 Black; 04-11-2019 at 06:13 PM.