New guy has a question.
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New User
Joined: Jun 2010
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From: Chinquapin
New guy has a question.
I recently purchased a 04 F250 earlier this year. It's my first super duty I've ever owned, and I love it. Just have a question that I haven't been able to find an answer to, on my manual hubs, you can switch it to auto or to lock. What does it mean to have it in auto? May be a dumb question, I thought it may mean exactly what is says, auto. But I just wanted a clear answer from somebody that knows more about it than me. Also, what is mechanically going on when it's in "auto"? I know what happens whe you put em inlock obviously. Thanks for any info offered.
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Joined: Apr 2005
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If you have the electric 4x4 switch on the dash, then the Auto position will engage, when you switch into 4x4. The hubs will disengage when you go to 2hi (that's if you vacuum lines and hub seals are working correctly). If they don't engage properly, then you can manually put the hubs in the Lock position.
If you have the manual transfer case (lever on the floor) you have to manually put the hubs into the lock position for 4x4 to work.
If you have the manual transfer case (lever on the floor) you have to manually put the hubs into the lock position for 4x4 to work.
Token Redneck
Joined: Jun 2007
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From: Breckenridge, TX
https://www.ford-trucks.com/forums/8...ml#post7128267
Here's the first thread I searched up about auto hubs, it's a short one, but it has a link to an owners manual in it that hopefully still works
Here's the first thread I searched up about auto hubs, it's a short one, but it has a link to an owners manual in it that hopefully still works
Originally Posted by texastech_diesel
"In "Auto" the hubs are not locked into the stub shaft, so the front axle does not spin when the truck drives. When the ESOF system is activated, a vacuum pulse locks the hubs into the shafts, so that the transfer case can power the front axle. When the system is turned off, a vacuum pulse unlocks the hubs. In "lock" the hubs are always locked in, the front axle always spins, but is only powered when the t-case is engaged by flipping the switch in the cab. The lock function is provided because the vacuum system is notorious for failing, so you can manually lock the hubs and be assured that the wheels are getting power in 4wd."
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Beachbumcook
1987 - 1996 F150 & Larger F-Series Trucks
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Sep 29, 2005 07:48 AM
