I have installed an MUA5 on a 2nd gen rodeo, and it has a small round inspection plate on the bottom of the bell-housing. Yours may be different, but for what its worth... Remove screws and look in there with flashlight while someone up top presses clutch (engine off, ebrake on, I'm not very trusting). See if the fork is engaged with the release bearing (two ears on the 2nd gen rodeo, '91 may look different), and the bearing is pulling the pressure plate as it is supposed to. If the hydraulics of the slave cylinder are working right, it should be rocking that fork and pulling the pressure plate via that release bearing. Sounds as if you can't feel the pressure plate spring force. If its disconnected in there, the transmission needs to come off to fix. While you are looking, check to see that slave cylinder plunger is engaging the fork too. There may be a way that can get misaligned.