I had one original hub on there, and one replacement hub, Select-o-matic i think. They didn't work, worn out, so i had a friend replace them. All he could find was old Warn hubs, they mounted on the axle but he said they didn't fit right, that the splines were not fully engaged by the hub. Anyway, they're on there and work ok, but if the splines aren't fully engaged by the hubs i could spin off the splines on the end of the axle under difficult 4x4 conditions. SO, i need to swap them out for the correct model. I'd prefer original stock (i think that's the Spicer w/ flat blade knob), but the correct Warns would be good too.