Clutch Master Cylinder

[gigs02ws6]

Can anybody tell me the signs of the Clutch Master Cylinder Starting to go. Previously I posted that I have a High clutch but no Slippage at all. This is still the case, but the last several days I have noticed some occasional noise when shifting, only way to describe is it's a grrrrrrr sound not loud and not all the time. Is this the signs of the clutch not being disengaged fully before shifting. Any help would be greatly appreciated. 62,000 miles on the Car

[20ws6speed01]

Is ur Clutch fluid nice & clean OR black?..if black the seals in clutch master may have failed...Mine was..I lost pedal & had to speed shift and pump the clutch to take off from stop..