auto locking hubs won't

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Oct 26, 2004 | 08:11 PM

philn

Thread Starter

Tuned

Joined: Aug 2003

Posts: 284

Likes: 5

From: Mena, AR

auto locking hubs won't

Got stuck the other day and discovered that my auto locking hubs didn't lock at all. Is this common? it's an '02 f-250 with about 68K on it.

Oct 26, 2004 | 09:50 PM

wlihntr

Postmaster

Joined: Jan 2004

Posts: 4,758

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From: colorado

the auto hubs are vacuum operated, if they dont work then you have a vacuum problem(leak, bad pump, ect.)

Oct 26, 2004 | 10:03 PM

RickyBR

Senior User

Joined: Apr 2004

Posts: 316

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From: Roaring Branch, PA

could that be the reason that my one hub don't want to come out sometimes?

Oct 26, 2004 | 11:04 PM

NJ2000R

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Joined: Jan 2002

Posts: 66

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From: Wyckoff

I had the same problem, changed to warn manual locking hubs, problem solved....well OK, not solved, just eliminated

the factory vacuum operated hubs are prone to this, they get dirty and stop working....factory parts are expensive, and being made from plastic, will only fail again....I dont mind getting out and locking the manual hubs before off roading or driving in snow....

Oct 27, 2004 | 07:39 AM

RickyBR

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Joined: Apr 2004

Posts: 316

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From: Roaring Branch, PA

This is the first time that I have ever heard of a cause for this problem. Is the existing vacuum parts able to be cleaned?

Oct 27, 2004 | 07:53 AM

NJ2000R

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Joined: Jan 2002

Posts: 66

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From: Wyckoff

my mechanic said that it was a sealed unit, not serviceable....

Nov 4, 2004 | 08:13 PM

SimCity

Freshman User

Joined: Oct 2003

Posts: 44

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Does anyone know how to fix the vaccum leak in the hubs. What are the repair parts needed and called. I would like to ask parts store if they have and how much. Or, do they have to be bought at Ford only. Is it hard to change out parts. Appriciate some feedback here.

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Nov 5, 2004 | 08:24 AM

rcm800

Junior User

Joined: Nov 2004

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Usually the problem is the vacuum seal on the backside of the hub. Kind of a pain to fix, but not real hard. With the engine running, place in four wheel drive and pull the vacuum line off the nipple on the front end on both sides. Plug one end and check the other end for vacuum. If there is none than the problem is in a hose or the vacuum pump. Then try to connect each line individually and see if you can tell which side has the leak. This is the one that need the seal replaced. The seal is only about 20-30 bucks at your Ford dealer. You may also want to have them remove and install the new one after you have removed the axle from that side. Then just reinstall.