I just wanted to report that my clutch master cylinder went and was successfully replaced. I also had the slave cylinder replaced. The symptoms were that the car would intermittently not allow me to shift into any gear or while I was on the freeway I could shift in and out of gears with strange ease. There was no grinding or noise typically associated with clutch failure.

Anyway, not being able to shift into gear meant my car had to be towed twice. Hope these symptoms help someone else.

 

I'm on my 3rd master cylinder in 10k miles! I'm getting really good at changing them.

 

im thinking mine is going...i replaced my clutch with a clutchmaster stage 3 and lightened flywheel in the summer and found my slave leaking afterwards so i replaced that right away. now intermittenly ill come to a stop with the pedal engauged and i cant get the shifter out of gear without a fight or depressing the pedal again. im thinking the master isnt strong enough for the added pressure