Chris there's a single idler pulley you need to check the next time you're under there. It's the tension pulley for your hydro drive belt. If the bearings get worn out to where that idler pulley is wiggling, it'll continue to throw the belt. I did the same thing, it ended up costing me a cooling fan on one side before I found that idler pulley was shot on mine. Don't forget to check the PTO pigtail for damage while you're under there and make sure it's routed away from all the spinning and moving stuff, a few properly placed zip ties on that pigtail harness will keep your blood pressure in the healthy range. If you see any places on the pigtail
Take a look that have been rubbing against something, tape it up or replace it. They're around $10.
