Hub Lock Question - Diesel Truck Forum -
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post #1 of 3 (permalink) Old 05-20-2012, 05:18 AM Thread Starter
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Hub Lock Question

I have a 2004 Excursion, and when I make slow tight turns I can feel a slight chug in the front end. It feels like it does in 4 wheel drive, but not nearly as bad. Researching this issue on this site, I think that the hub locks are either locking when turning, or just not unlocking all together. I pulled off both Hub Locks and inspected them. The left one had the switch cap fall off, and I noticed that a white plastic piece behind the switch was broken. My question is, if they are pulled off and selected to Auto, should they be able to freely rotate, or do they need vacuum applied to them to freely rotate. After I put the cap back on the left one, it allowed me to freely rotate the internal gear when I switched it to Auto. The other Hub will not unlock no matter how many times I switch it from lock to auto, but again I had it off of the wheel and I do not know if it needs vacuum to unlock the internal gear?
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post #2 of 3 (permalink) Old 05-21-2012, 04:34 AM
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Pretty sure vacuum locks them but if i remember they can get stuck in lock too Moisture gets in the hub due to the vacuum activating a diaphragm. You'll notice it looks pourus on the selector so air can come in. I had one stuck in lock on my super duty. Ford wants $250 per hub. The Warn set is $200 and will never break again. All in if you don't mind getting out in the cold to click em in.
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post #3 of 3 (permalink) Old 05-21-2012, 10:13 PM Thread Starter
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Thanks. I will check the vacuum parts first, but it sounds like my hub locks are bad.
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