During stop/go driving the clutch pedal gets progressively less effective at working to the point where the pedal doesn't come back all the way. I found that this is caused by the slave cylinder piston getting sucked back into the body of the slave actuator (so all that the clutch pedal action did was to push the slave piston back to where it should have been).
Question is what's broken? is the master actuator broken because it causes the slave cylinder to suck back past the point that it should stop (i.e. on the pedal back stroke it doesn't let clutch fluid back into the circuit) or is the slave worn out because it relies on seal friction/piston friction to stop being sucked back. Or is the master seal worn and is bypassing)
At approx $100 for a slave and $200 for a master replacement - it'd be nice to get the right part changed not both Thanks