The front hubs are always locked and the axles are always spinning. Like I said there is a vacuum operated mechanism in the front differential that engages the front differential to the front driveshaft. I believe the transfer case is gear driven, could be wrong. Make certain the 4WD lever is all the way to 2WD and lube the linkage. It may be hanging up part way between 2WD and 4WD.
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Hank
70 Chevelle SS396(454), M20, 3.73
My Chevelle
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