Interesting discussion, but I'm missing something: if the hubs are locked, but 4wd is disengaged, the front wheels are mechanically still locked to the front axle, although not powered by the front propeller shaft. So, does that mean that the front wheels, still locked to the front axle, must always rotate at the same speed? If true, that sounds like it would be bad for tire wear. I've driven a lot in 2WD with the front hubs locked and never noticed any problem, so I'm just curious.

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