"The next step would be to disconnect the driveshaft and verify it is the engine that is not turning and not the transmission. If the engine itself still doesn't turn, you're going to have to tear it down and figure out what happened.
I suppose there are other possibilities, but I don't think a seized PTO clutch bearing would get it stuck so bad you couldn't turn it with a pipe wrench, and I think the pump side of the hydro seizing is also extremely unlikely."
Good thinking. How about the fact that I towed it backward (Probably should have propped something in the hydro release to keep it released, but I didn't) and the hydro release was not released? Would that have spun the engine or trans backward and harmed something?
I suppose there are other possibilities, but I don't think a seized PTO clutch bearing would get it stuck so bad you couldn't turn it with a pipe wrench, and I think the pump side of the hydro seizing is also extremely unlikely."
Good thinking. How about the fact that I towed it backward (Probably should have propped something in the hydro release to keep it released, but I didn't) and the hydro release was not released? Would that have spun the engine or trans backward and harmed something?