by GT4 20 » Mon Mar 20, 2006 2:04 pm
Had a similar issue a while back and it was the slave cylinder on the gearbox. Try removing it and either get it reco'd or replaced. I'd also completely renew the fluid at the same time. If it looks really mucky, I'd also recommend getting the master cylinder sorted out at the same time.
HTH
Gary
1999 Subaru Legacy B4 RSK TT