Self-propelled transmission locked up?
I have a Craftsman 917.376390 push mower, and it seems like the transmission for the self-propelled stuff is locked up. The front wheels, including the axle running through the transmission, turn freely, but the transmission itself seems locked up since the pulley wheel doesn't turn when the axle does. I tried turning the pulley wheel on top that the drive belt connects to with my hand and it won't budge.
Do I need a new transmission? Is there anything I can do to free it up and save $30 + shipping?
Edit: The mower runs and cuts fine, it just isn't self-propelled anymore.