If i were you I would just go on the ORU website and look up there phone number and ask them directly, they make it so they should know whats up. As far as Dana 44 and 60, like they said before it depends on the usage but you can build the hack out of a Dana 44. I know a guy who runs 44 inch tires on his dana 44 and he rebuilt the axle and has never broken anything. He does mostly mud though.