found a l2202m for 1.2K, has a loader and running engine but the gearbox is stuck (wont freewheel). im heavily considering buying it but wanted to ask either, what would be required to fix it roughly? would it be better to hire a mechanic or just do it myself, since i have experience with mechanical stuff, just not tractor transmissons specifically. would this be a PIA repair or something thats fairly simple?