Well folks. I figured out (with everyones help) the no brainer vibration trouble. Bad u-joint. Now I've decided to tackle the transmission issue.

My transmission grinds slightly in between shifts. If I allow a slight pause between shifts it wont grind so I believe the synch's are still spinning?

91 Wrangler 2.5 ltr 5 speed.

I made sure the slave cylinder was bled with my son's help. No air in the lines. I literally have what I concider no pedal stiffness at all. Just the tension of the spring on the pedal. This thing has the slave cylinder thats built in to the throw-out bearing. Now that I've made sure there is no air in the lines I'm thinking either the slave cylinder is bad or the clutch master cylinder? When I have the cover off the clutch master cylinder....and my son actuates the clutch pedal.....shouldnt I be able to see the level drop slightly in the resevoir....and then see fluid flowing back in....like you'd see in a brake master cylinder? When I bled the lines....under pressure fluid would shoot out of the bleeder like it is suppose to. Maybe my pressure plate is bad? I'm thinking that this would keep the face of the clutch in slight contact with the flywheel....not allowing the transmission to be free from the engine...hence the syncro's still spinning causing the grinding?

I'm not experienced with the manual transmissions but I'm trying.

Any help appreciated.

Thanks,
David G