Re: YJ clutch
Most likely it's the infamous slave cylinder inside the tranny. Try bleeding it first though, you will find the bleeder valve on the passenger side of the tranny on most YJ's, just loosen it a little till it starts to drip (slowly) then get out from under your jeep and fill the resovour till full, press clutch pedal and refill again, repeat about 4 times till you bleed out all the old fluid, finally fill reservoir and run under jeep and tighten bleeder. Now feel clutch pedal. If it has presure then test drive it (slow). If it doesnt work then chances are it's the slave cilynder, but before you do that I would replace the little master cylinder first being that to replace the slave you would need to drop the tranny to get to it. So to recap, bleed, test, if ok now then great. If not replace master cylinder, if ok now then good. If not then $hit! Replace slave cylinder.