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Auto Locking Hubs not engaging

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Old 05-27-2011, 10:33 AM   #1
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Default Auto Locking Hubs not engaging

1998 F150 4x4. 4.6L. 5 spd. Four Wheel drive is stick also. The light comes on, and the transmission is clearly engaged - but hubs are not locking in 4-high or low. Any ideas?
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Old 05-27-2011, 11:07 AM   #2
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More than likely there is just debris in there. Take them apart, and clean them. It's not a hard job at all, and 9 times out of 10, is the fix. I do it after every time I hit the mud.

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Old 05-28-2011, 05:18 AM   #3
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that happened to mine and i removed the vacume actuated shift pod on my front diff. take it off and lube the moving shift fork back and forth. reinstall and it should be fine. and f.y.i. these trucks dont have auto hubs or locking hubs out on the end of the axles like the older fords. when u shift into 4x4 your transfercase gives power to your front diff and the vacume pod on the diff engages the axles.
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Old 05-28-2011, 06:18 AM   #4
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Like 7700 says, these trucks have no locking hubs. If the axle pod is good, right behind the battery is the two solenoids that control the vacuum to the front differential. You can check those vacuum lines for cracks or breaks at those ports. Good luck
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