How exactly do my hubs lock?? - Ford Powerstroke Diesel Forum
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post #1 of 12 Old 12-07-2008, 06:38 PM Thread Starter
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How exactly do my hubs lock??

I have electronic 4x4 engagement and my hubs have auto and locked. Exactly what does this mean? I assumed that Auto means they would lock once I selected 4x4. I was using the truck today and needed 4x4 and engaged it. But no 4x4, the truck just sat there and spun the rears. I had to get out and lock the hubs. What does the auto setting on the hubs do?? Do they lock once the truck is moving maybe??


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post #2 of 12 Old 12-07-2008, 06:40 PM
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they lock by vacum lines which sometimes well 90% of the time dont work. i just disconnected mine and eventually switched to warn hubs

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post #3 of 12 Old 12-07-2008, 06:45 PM
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Hubs

The auto side uses vacuum to engauge the hubs. Once you turn the nob on the dash, the hubs are suppose to lock automatically. Mine were not working when I bought my truck and I found out that the seal in the knuckle was bad. I discovered this when I had to replace a unit bearing on the passenger side. After the new seal and bearing were installed, it works fine now.

Also, were you running your heater or defrost or anything when you tryed to lock the hubs. I ask because a friend of mine has the same year truck, and when his climate control is working in any way, it robs enough vacuum that his hubs will not work. Sounds like BS, i know, but I have witnessed it. I think he has problems with his vacuum pump or a major leak somewhere, but we have not figured it out yet.

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post #4 of 12 Old 12-07-2008, 06:49 PM Thread Starter
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I backed up to a trailer to pull it out and when I attempted to go the rears just spun while I sat there. I switched to 4x4 and still sat. I jumped out and locked the hubs and walked right out.


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post #5 of 12 Old 12-07-2008, 06:57 PM
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I have to be moving for my sotf to work.....

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post #6 of 12 Old 12-07-2008, 06:59 PM Thread Starter
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Tell me if I have this right; With the hubs set on auto vacuum locks the hubs when I engage the switch. If for some reason they don't lock I can still lock them by manually turning the knob to lock on the hubs??


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post #7 of 12 Old 12-07-2008, 07:01 PM
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Hubs

Absolutely

1999.5 F350
4" Straight Pipe / Gauges (Pyro, Boost)
Wicked Wheel / Wg delete / Boost fooler
Tymar intake / Zoodad Mod / NChornet CCV mod
Hpx Crossover / Fuel CCK / ITP prepump tank mod
FPR Shim w/ underhood gauge
AIH Delete / Non Ebpv pedestal w/ valve delete
TW 6 position chip (will never own another canned toon)
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post #8 of 12 Old 12-07-2008, 07:03 PM
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OK, I though the sotf was for "on road traction" like you would find in a car, and then if you locked the hubs that means that those wheels are getting full time power..

Someone tell me if I am right or wrong please!

The Mullet Mod
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*Afe Intake
*4" TB Exhaust
*Scangauge
*SCT
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post #9 of 12 Old 12-07-2008, 07:12 PM
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no, if its in auto, you still have 4x4 capability, but you have to turn the selector knob to 4x4. If its in 2wd, and your hubs are in auto, you just have 2wd. if you switch the hubs to lock, then they are locked at all times. selector knob doesnt play a part in it anymore.

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post #10 of 12 Old 12-07-2008, 07:16 PM
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I thought that if the hubs are in auto(with 4x4 engaged) it transferred power to the wheel thats not slipping, but if the hubs are locked both wheels get full times power

The Mullet Mod
Stock 2005 F-350 4x4
*Afe Intake
*4" TB Exhaust
*Scangauge
*SCT
*
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