Hi Scotty, My 1986 Porsche 928 5 speed manual clutch is stiff. If I increase the clutch free-play, it becomes softer but after awhile it drops to the floor as if there's air in the system. I replaced both master cylinder ( shares with brake) and slave and reverse bled. If I decrease the clutch free- play, it works fine but harder to press.

wow, and oldie. I would assume the clutch itself is worn inside the transmission causing hard to press symptoms

Thanks for your reply! I think it has something to do with the clutch pedal push rod not extending far enough and blocking the hole when free- play is increased and pedal won't return even though feels softer.