There is no O-Ring.
there is a hard line line sticking off the top of the knuckle, trace the rubber hose (which probably needs replacing) to see if it has any cracks or tears in it. if there is a single tear or missing hose the 4x4 system will not work.
On the passenger side frame rail, towards the front of the truck will be the valve that controls the whole system. Also check that.
the PVH hubs are garbage. Spend $130 and upgrade to the AVM lockers. I had my system in working order and one day my hubs decided not to come out of 4x4 anymore.
For future refrence, Taking the PVH plastic piece off of the hubs (if they're stock) requires lifting the plastic tabs over the two or three ridges on the outside of the hub and pulling the hub out to you
If it is an aftermarket hub, there will be no ridges and just requires lifting of the tabs.
'99 4x4 Off-Road | 4.0 with 4.10. | 33x12.5R15 BFG A/T | Mickey Thompson Classic 3's
Originally Posted by 2004xlmiller
i can kill trees/deer/liberals or whatever i want now. its solid.