One way to know what is leaking is to ask yourself what resovoir is going low i.e. where are you having to add fluid? If you have been adding brake fluid then that should be a warning because under normal circumstances it only goes down very slowly as the brake pads wear. It is possible it is brake fluid and the booster has gone bad allowing brake fluid into the vacuum hose, destroying it from the inside out, and then leaking out. Remove the vacuum hose at the booster and examine the inside of the hose. If it is wet with brake fluid replace the booster and the vacuum hose. The other possibility is if you have an automatic trans and it is trans fluid. It is not likely you would confuse with anti-freeze or engine oil. If it is brake fluid it COULD be dangerous to drive the car with this defect as you could loose the service brakes. Double-check that the Parking brake (Emergency brake) is in good operating condition and if it is brake fluid repair before driving the car. Brake fluid will soften the epoxy but if you clean it off it will reharden. It will discolor the epoxy and if it lifts from the metal it will not readhere. The hose is nothing special just make sure the replacement is meant for vacuum as if not it could collapse. This might also be a good time to flush, refill, and bleed the brakes with Castrol GTLMA DOT 4. David Teitelbaum vin 10757 --- In dmcnews@xxxx, Noah <sitz@xxxx> wrote: > Ok. I was under my car playing "guess what the fluid is"; in this case, > the fuild was all over the bottom of the back of my transmission. Not sure > whether I've actually found the cause of that fluid's presence, however my > vacuum hose (part #100842) has split in about half a dozen places. > Amusingly enough (to my novice eye, at any rate), there are several