I have an 04 F-250 King Ranch Diesel and the 4x4 will not work.It first started to go in 4x4 but would not go back to 2 wheel drive.Now it will not work at all.I replaced the switch on the dash and a new 4x4 motor(The one that bolts onto the transfer case)and nothing.Any ideas.Would like to fix A.S.A.P Before cold weather get's here.
Get out, lock your hubs in manually, get back in, shift the truck into neutral, and then select 4wd. Should work that way, as time goes on, you lose the vacuum which automatically will lock everything in. When this happens, and you select 4wd, with the a/c on, it will stop blowing out the vents, and come out the defrost vents.
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