I have had some problems of late with the brake master cylinder leaking fluid. The only symtom is the fluid gets low and the dash brake light comes on. It finally got so low this week that some air got sucked into the lines and now we have spongy brakes -- but the clutch has started slipping too. Since there is only one master cylinder on the firewall, is this running both the brake and clutch systems? I've heard that some cars use that. I can't find anything that looks like its coming off the clutch pedal.