So I'm gasing up and doing my regular fluid checks oil, coolant etc...Now my clutch fluids hasn't been changed in a couple years and is looking pretty dark. The fluid in the resivour has been sitting just above min for quite a while. I decided to top up the clutch fluid using DOT-3 brake fluid. 2 hours later the clutch pedal travel to the floor with little or no resistance and I can't change gears coquincidenceI 've never had a problem with the clutch in the 4 years i've own the car. Took the res cap off and got a buddy to pump the clutch. Air pockets rise to the top, how did I get air into the system I can build pressure back up in the clutch by pumping it but it does last long, once I start driving it goes right back to being on the floor. Should I bleed/flush and refill the system? is it the master or slave cylinder? I'm taking it into the shop tomorrow. Any buddy got any tricks?

Thanks in advance

 

Your master or slave is dead, replace both with new units.

Preferably also change your line with a oem or stainless steel line.