read this
http://www.geocities.com/lmp4203/kia...hubinstall.pdf
Remember you need a complete kit: hubs, cams, spindle nut and lock pin.
I have these hubs and they work very well. SOme precaution though: contrary to the vacuum type they MUST NOT be engaged on the run. SOme will insist they do..yes they will engage a few times but with a terrible bang.
ALso you can switch from 4 to 2WD at any speed and then the T-case is off, but the hubs are still ON and all shafts are turning....so in THIS condition you CAN return to 4WD on the fly because all shafts ALREADY rotate. BUt NEVER if they were OFF from the start.
TO disengage the hubs you must stop and back off a few feet. You then CLEARLY hear them Click-Click off...just as you hear them click-click ON when you start on 4WD.