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If you have the ESOF (Electronic Shift on the Fly) option, the F250 SD 4x4 comes with auto locking hubs from the factory. They lock and unlock by themselves when you select 4 wheel drive on the dash. This is accomplished by the turning of the axles after they are engaged by the transfer case. The unlocking is also done automatically when the transfer case releases the axles and spring pressure in the hubs return the spindles to free floating. If you have manually locking hubs,... well that speaks for itself. I have replaced my auto locking hubs with Warn manual locks. Superior, trust me. Besides, I'd rather lock my hubs and turn the front diff, knowing that when I need the 4x4 it's gonna be there, instead of wondering whether the auto locks are going to engage after not having been used all summer.

If you do not have the ESOF option, it's old school: get out and turn the dials on the wheels then shove the lever into 4x4.

If they won't turn, it is because they have seized, which is a common problem on Fords. You will need to remove the assembly and repair or replace. If you have ESOF, you can ignore the problem and assuming the ESOF never fails you, you won't need to turn them. ON ESOF, the manual turning of the dials is only a backup system if the vacuum assist of the ESOF fails.

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Q: How do you lock and unlock the hubs on a 1999 Ford F-250 4x4?
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How do you lock the hubs on a 1999 ford F250 4x4?

Rotate the black center in the front wheel clockwise.


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Is it possible to change your manual hubs to auto hubs on your 1999 F250 super duty?

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Is a 2001 ford f250 xlt 4x4 shift on the fly?

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Engages automatic locking hubs on for wheels drives with automatic hubs.


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What year? Pre 1999 Ford used the fully automatic hubs. These had a bad design causing the cam gear to not operate correctly. If they stay engaged put it back to 2wd and reverses turning the wheel left and right this should disengage them. 1999 and up super dutys had 2 kinds. The Pre 2001 had auto/manual hubs which worked pretty well. The later models used an auto/manual hub but modified. This was operated by a vacuum line, when you engaged 4wd a vacuum was applied locking them. You could also select manaul to ensure they were locked. So look for vacuum leaks.