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It would be nice if there were aftermarket locking hubs for one..
Or the bearing is simply made differently.There has got to be some sort of setup to take the side load.
I was mainly thinking about fule milage because it makes a big difference without the front drive line in, mileage wise around 4 to 5 miles a gallon on the crd depending on how hard you push it. I dropped from 37 miles to the gallon to 32 to 33 miles to the gallon when I reinstalled the front drive shaft. If it had locking hubs to where the wheel bearing were the only moving parts instead of the front drive train and transfer case being turned it wouldn't surprise me if it wouldn't get around 40 ± mpg.Not really. Good quality unit bearings (like Timken) are simple, strong, and last plenty long.
I picked up some Explorer hub stuff from a guy that that was modifying it for a jeep TJ. (He'd given up). I got no further. Pretty small/flimsy mechanism to work with the 5x4.5" pattern.