locking hubs - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 2 (permalink) Old 02-03-2011, 09:27 PM Thread Starter
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locking hubs

I have a 11 SD 4x4 with auto locking hubs - you turn the dial in the truck and the four wheel drive engages automatically. Since everyhing is managed from the cab, why do the wheels have 'auto' and 'lock' hubs that you can manually engage ? It was the same on my old 06 SD.
Never have had to use the manual system, but Im assuming it's there as a back up, or redundant system in case the automatic locking malfunctions ? Is this correct - if so, is it as simple as just turning the hub to 'lock' or do you have to activate it from the cab too ?
Just curious.

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post #2 of 2 (permalink) Old 02-03-2011, 09:52 PM
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As you suspected, it is there as a backup. If the 'auto' portion fails (or if you just want to keep them locked), you just turn it to 'lock' and it will lock them in manually. You will still have to turn the switch (or pull the lever) in the cab to engage the transfer case to get 4x4 to actually work.
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