clutch? tranny? HELP!

How can I tell if my clutch went bad or if its my tranny? The problem came on suddenly. I was driving home and the engine started to sound rough and I lost engine power. Then 3rd wouldn't catch, then 1st, then 2nd and I barely got home before I couldn't shift at all. Now its sitting in my driveway stuck in 2nd. I can pull if out of 2nd if I really try but now its grinds in neutral and sometimes will lurch foward and stall. If I hold the clutch down the engine seems to run fine.What happened? My car was running fine. This all happened within a matter of 5 or 6 blocks. By the way its a 90 Legend with a manual transmission. Any feed back would be appericiated.

I think Ive narrow the problem down to two possibiltites. I think I either have a damaged input gear bearing or a damaged clutch release bearing. Does this sound right to anyone? Does anyone know how I could test this without pulling the engine or transaxle? If one of these is the problem do u think its worth fixing? If anybody could give me some feedback I would really appericate it.

My 88' just started doing the same thing. M y son thinks it may just be in the Hydraulics. ??

U saying it might have a bad master cylinder or a broken line?