I guess my reply could have been a little clearer...
I was just suggesting alternative problems that may cause the
"lock-up" condition you are describing... to me it sounds like either the hubs aren't fully disengaging or that the u-joints may be causing the problem.
If your hubs are fully disengaged and your axle u-joints are in good shape, it shouldn't matter where the shifter is, you should not have binding at the wheel with the hubs unlocked.
Sorry for the confusion....
To check your axle u-joints;
lock your hubs, jack up the front of the truck (please use axle stands...)
turn the steering wheel to full lock in either direction.
Rotate the tire/wheel. If you feel "drag" or binding at a particular place during the rotation, make a mark on a u-joint cap that you can see, continue rotating the wheel. if you feel drag or bind at the same place during the next rotation, your u-joint is showing its age. ( make sure that its not brake drag you feel)
If you have the factory Ford (Warn built) hubs in your truck now, the only "up grade" that I would recommend would be to find a set of Spicer hubs from a 66-79 Ford or equivalent year of any mfg...
In my opinion, you won't find a stronger locking hub unless you use a full time block off plate. If you worry about breaking axles, then yes, you should upgrade to the newer style Warn, Selectro, or Mile Marker hubs.
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