Rock Chuck, I'm no expert but my buddies with Rangers claim you can get +5k miles.
I made it a whopping 800 miles before I smoked the belt on my Ranger. Got stuck in a bad spot and didn't put it low range and burned a spot in it. Still works but has a vibration. It is now my back up belt and I replaced it with a bad ass carbon fiber version from Gates.
https://www.amazon.com/gp/product/B01MY9G90V/ref=oh_aui_detailpage_o07_s00?ie=UTF8&psc=1
