Well guys, after installing a new south bend dual disc (HUGE shout out to these guys and full review to come. GREAT customer service) in my truck, I fired her up to find a god awful tick from underneath. After draining tranny fluid, it turns out that I broke two teeth off the cluster gear of my nv4500. I see you can buy replacement shafts off of ebay for $200. How involved is it to replace this shaft? I looked for a video or write up but didn't have any luck.