I have a Cub Cadet 782 International to which I mount my #2 International tiller. It has very few hours on it, but today it seemed to get "jammed up" while I was tilling the garden and made an awful screeching sound and I shut everything down. I drove back to the shop, cleaned the corn stalks and other stuff out of the tines and gear box area and tried to engage it again with the same screeching sound. Pulleys on the tiller/gearbox are free, I can't get the tines to budge. Any tips or things I can do to free up the gearbox? Is it time to take everything apart? If it is a damaged gearbox are parts still available for the #2 tiller? Thank you!