ESOF Hub ?
 

Would like to switch to the Warn hubs since one of my stock ones won't turn. The question is, the Warns look like they have an allen head bolt pattern on the face bolting the hub to the wheel. The stock hub is held on with a snap ring. Can someone explain how this will work? Thanks.

The Warn hubs are a 2 piece. The inner chunk slides in and is retained. The outter with the allen head bolts threads into that to lock it in place. If you do this you will need to plug the vacuum line up by the pump.

Thanks for the info. Does that vacuum pump do anything other than pull the hubs in?

Runs the vents in the cab amoungst other things. Bottom line, don't remove or disable it.