If you actually thrashed the output shaft then yes there is a snap ring that holds the shaft on the rear planetary gear and sprag. Once you get it off the shaft slides out. Better off getting a used aw4. I just rebuilt mine and if you mess something up like I did you won't have a overdrive that works lol or you can tear seals really easy if it's your first time rebuilding.
If you want to give it a shot the aw4 manual is online so you can see how to get to it. Good luck bud.