xoc, i understand the concept that all 4 wheels travel on different path when turning. but what i don't understand is about the hubs. what are their purposes? I'm no mechanic, but my guess is that the hubs lock the 2 front wheels when engaged in 4wd while the transfer case locks the front & rear axles (again, just my uneducated guess). and when shifting back to 2wd & leaving the hubs locked will hurt gas mileage & promote component wear. why is that? (pardon me for the rapid fire questions)

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