I've been having a problem for years with losing oil from the gearbox
(transmission) on my e30 track car. I replaced one seal after another and
eventually came to the conclusion that it must be one of the seals in the
front that you can't get to without opening the box up. So last January I
bought a used gearbox from another club racer and it loses oil too, maybe
worse than my original box. Since the replacement doesn't hold oil either
I took the original box into a shop and asked them to replace the front
seals that are only accessible from inside. They called a little while
ago and said there is nothing wrong with those seals. They suggested that
maybe I am losing the oil out of the breather vent. Does this sound
plausable to anyone else? I can't tell exactly where the oil comes from
does it does seem to be primarily all down the drivers side of the car,
and sometimes I notice it dripping off of the slave cylinder too.

Thanks!

Joel