Okay, I knew that I would ruffle some feathers with that statement.
Here are my arguments for not spending $500-$800 for a set of locking hubs:
1) Increase in mpg is only 1 to 2 mpg. The hubs would pay for themselves after about 15,000-30,000 miles of highway driving. Much longer when I start using fast food cooking oil.
2) The differential is turnning with no load and the wear is minimal. How many worn out front differentials have you seen?
3) My steering is very easy on the highway, no need for power steering. The steering effort is effected by loading on the front axle. I can control that with the way the truck is loaded and how I "park" the K-boom. Power steering may be nice, but not needed, off-road or when parking a trailer, for example. Some power steering components are exposed slightly below the front axle housing (have to double check that, but I think it decreases the ground clearance some).
4) Locking hubs have not been tested to my satisfaction off-road. Can they withstand a bump into a tree stump or a rock?
5) You have to leave the driver's seat to engage them. With only one driving axle (the stub axle is removed for highway driving), I often have to engage front wheel drive to make it over a curb or up a slight incline on a gravel road. (BTW, removing the stub axle is where the real improvement are, tighter turning radius, less front tire wear, better fuel milage, much less stress on drivetrain components, which are loaded here).
If they were disabled within the differential, like lockers are, from the driver's seat, THEN I may consider this feature.
Oh, one more thing, I don't like the looks of them.
If I absolutely had to have freewheeling front hubs, I'd bore out the standard ones (did that years ago, but sold them).
I'd rather upgrade to CV-joints in the front to help ease steering off-road.
There you have it , turn on the flame throwers, eldkastare, flammenwerfer or just light a match and prove me wrong!
Regards,