Don't know if I posted it but the guy across the road has a Husky ZTR and it took a dump and it's sitting in his barn. Have no idea what the issue is but I have to assume that one, he didn't perform any maintenance on it like changing the oil or greasing it, he's one of those run it until it don't then fix it. I presume it's the Tuff Torque transaxle however and I would never buy anything with that drive. They really not rebuildable nor can you change the oil in them (not that he would anyway).
Both my ZTR's have Hydro Gear transaxles, actually 2 independent drives, one for each rear wheel and Hydro Gear drive units actually have oil filters and you can change the oil in them plus they are rebuildable, not that I ever have because I have no issues with either.