If there were no noises, then I think I would go back and recheck your cable groments and make sure they have not completely come apart on you. "bigmoneyracing" has a great thread on this subject, with pics and plenty of conversation on part numbers, that should help you out. It can be found, using search, here in the tranny forums.
Then again, it "might" also be possible that you bent a shift fork. I know of one other person that has done this, but can't remember if there were noises involved with the bending of the fork. That's mainly because 5th gear locked up on him and he bent the fork trying to get the car out of gear too quickly or something like that. But, IIRC, after the fork bent he really couldn't do anything with the shifter after that, so...

I think he managed to get it in third, like you, and limp'er home.
I think we can rule out the dif blowing on you, because almost everyone that has had that happen has stated several noises and I know for a fact that it's a noise that, if you have ever heard it before, will never forget. Plus, you would not have been able to limp home. Crawl, maybe.
If you were able to get the tranny into third gear and limp home, then I think we can rule out the clutch and pressure plate assy.
I feel that you have something wrong in the shifting system, just hard for me to put my finger on it.
Good Luck!