Hmmmm......I have a nasty noise coming out of the transmission/clutch shft area of my F130. Not sure how I'll troubleshoot this one. For now I'm thinking drain the tranny and look for any damage to the shaft at the input. Also a few have suggested the problem could be the clutch or TOB, I'll have to get someone to crank the engine by hand while I inspect the clutch through the inspection hole.
This "noise" will sometimes prevent the tractor from moving forward, so it's a biggy whatever it is.