For the Love of God! Help me!!!

[black beast]

AHHHHHHH!
Sorry I had to get that out.

Ok heres the background, tell me if you know what is wrong: I was going down the highway at around 75mph when I heard a clunk, it was muffled, but I felt it, ten seconds later or so (under a minute) the speedo went from 75mph to 0mph, it was cool to watch, but frustrating. I thought, damn the tranny, so I speed up a little, and I speed up, tach. still worked. The check engine light is on, and I can hear something at the driving idle (1000rpm) it sounds like a remote controled car be pushed when off (the whine of the gears and such) but if I accelerate, it stops, and no its not covered by my exhaust, it is louder in the cab. When I get out, I can smell something not burning but unpleasent, and it is a strong odor.

Present: I am sitting here safe at home, but sad and confused.

What I want: Someone, anyone to tell me what the heck is wrong and about how much to fix it.

Thanks guys, I know that you will all try to help.