What is stuck?? Rear wheel won't roll.

When I pulled the F-1 into the garage the left rear wheel didn't turn and drug through the stones, no big deal, pull the drum, free it up. I looked and the drum is already gone?!? What the hell else is there to bind? The driveshaft is gone, but the u joint mount does turn with the wheels. Once I got it into the garage on a hard surface it does turn, but really hard.
CHAZ

 

rust in the centersection? maybe water got in there and rusted the gears fast?

 

Axle bearing bad or froze?

 

I'd say bearing too, or bent axle.

 

I have a better rear end, so that is no problem, but how do I loosen it up to roll it around?
CHAZ

 

You'd have to get it apart and go from there. If you have a better rear why don't you just use that one?

 

mebbe a bent axle??