Hi, it now being Spring, I pulled my 87 Spider out of hibernation. When I parked it all was working properly so I was surprised to find the clutch pedal had virtually no resistance, and hence, am not able to shift gears. I checked the fluid reservoir at the master cylinder and it was a bit low so I filled it. I don't know how it would get there, but could air in the line cause there to be no resistance at the pedal. Since it was operating properly as when I last parked it, I can't see how it could be anything mechanical. But I'd be grateful for any insights to solving this problem. Thanks in advance!