Okay here's the scoop
Wade is busy installing his Powertrax; I took a trip to the local Ford dealer today to eyeball a hub assembly.
The good news: while they didn't have one in stock (this is not exactly a common part; the closest one to me is at a dealership in Chattanooga, TN) I got a printout of this hub. It is a "pulse actuated vacuum hub assembly". And YES, the drawing shows the vacuum lines going into the HUB, not the axle tube!
The bad news is that this part ain't cheap ($227) and return policies on mods seem to go nowhere here since the dealership isn't too keen on ordering me a part I'll probably return.
I have emailed Torrie and am working out a return deal for him to ship me one of these hub assemblies. Please do not bombard him with questions or requests since it is still a shot in the dark for him too. I will order this hub and try to install it as soon as I get it; hopefully next week sometime. If this works, I'd like the rest of you that are interested in this to give Torrie the business for sticking his neck out with us on this experiment, instead of special ordering it from your local dealership.
If it fits...
WOOF! I'm buying a Powertrax. Herc will be a BigDawg before the Tellico run, and where better to test it out than on the wet moss covered rocks of North Carolina?
Jefe, yes, we will still be in 3 wheel drive, which means turning on pavement will require a learned technique. My rear NoSlip doesn't engage under limited throttle and once turning and the wheel speeds are already differienciating, it takes a lot of throttle to engage it. I am hoping that since the "4auto" setting we have doesn't engage full power to the front, it won't engage the locker either.
But it might. If so, it may still be okay. I am thinking that to execute a U-Turn on pavement will require coasting into the start of the turn but once in the turn a good amount of power could still be applied to finish the U-turn without squealing the tires. If it was another locker besides the NoSlip that gripped sooner, I don't think it would be easy to handle. But based on the great street manners of my rear NoSlip, I'm betting that the front will be just as easygoing. Heck, if it fits, our Explorer hubs are interchangeable (same part for both sides). If you wanted to shell out the extra bucks, you could buy two ranger hubs and the whole front will disengage. That would make sort of a "homemade ARB" system and bring it up to the price of an ARB, too.
There isn't much else to say at this point. I promise to update this thread as soon as I get my hands on the hub and try to install it; it may be a couple of weeks. And I don't have a scanner either to post the drawing; just trust me, it is very clear and shows the vacuum lines going directly into the inside of the hub assembly itself.