What the hell did I break???
If it doesn't spin jack the rear up and put the trans in gear and try to spin the rear wheels, if the driveshaft turns with it in gear and the clutch pedal up it's the trans or clutch.
A long time ago I was running an 8.2 GM rear with a ring gear spacer and a manual trans. I was cruising down the road one day and it just went into neutral, I shut it off, put in it neutral and reached under to turn the driveshaft and it turned. Never made any noise.
I pulled the rear cover off and found all the ring gear bolts broken.

