Ok guys. So, I bought a Luk master cylinder and installed it yesterday. After installing it and bleeding the slave, it worked perfect........until I drove it on the freeway. My clutch pedal began to get lower and lower and lower until I had no pressure. The different thing about it now was that I was that, if I pumped the brake pedal a lot, I was able to gain a little bit of pressure back (about 1/4 of the pedal).
Zeus: Can you or anyone else explain how to bench bleed the master cylinder of these? Because its not the type of fitting the you can screw on. It's the fitting with the slave to hold in the line.
I really don't want to drop the transmission unless I have to (internal slave). Any other ideas of what it can be besides the slave?
I don't lose any fluid, so I don't think I have a leak. The level of the reservoir stays the same. Thanks guys.