In 4wd mode, the transfer case engages the driveshafts, which in turn engage the ring and pinions in both axles, which in turn engage the drive axles. If the hubs are locked, the axles will be engaged by the hub gears and the front wheels are under power. If you have manual hubs and they aren't locked, the drivetrain will turn, but the driveaxle will spin uselessly since the gear in the hub has not locked onto the splines on the drive axle. Auto locking hubs will engage whether you want them or not. BTW, it is not good for the drivetrain to drive with 4WD engaged and the hubs not locked. I don't want to give anyone the impression that they can do it without incuring the wrath of the 4WD gods.
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Gordon "The Warmonger" White [This message has been edited by warmonger (edited 02-22-2001).]
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