4x4 wont engage - Ford Powerstroke Diesel Forum
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  #1  
Old 12-06-2011, 07:28 PM
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4x4 wont engage

my 4x4 will not enage at all?????

any suggestions
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Old 12-06-2011, 07:35 PM
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Bet the locking hubs are messed up
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Old 12-06-2011, 07:40 PM
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how can i check that?

whats the cost to fix that?
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Old 12-12-2011, 01:27 PM
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If it was me i would turn the 4x4 knob and listen to make sure the electric motor is working if it is you will know its a hub problem. Im not sure if the hubs on these new trucks are but on my old 2000 modle they were vacuum operated i took the old hubs off apart and the were siezed up, i actually ended up buying a set of warn lock-outs, i hadto ge out of the truck to lock them but they were alot stronger then those sock ones. If the hubs are vacuum operated you will see a little rubber line on them, they might be leaking or siezed up. you might also try turning them from auto to lock and see if they engage.
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Old 12-12-2011, 01:38 PM
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Quote:
Originally Posted by 6.4PSD View Post
how can i check that?

whats the cost to fix that?
Ya still under warranty??? Take 'er back to let them fix it. Just sayin'!!
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Old 01-08-2012, 05:41 AM
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I might as well add to this thread rather than starting a new one. I got my truck back from the garage this week and only drove it 2 days. They changed out my turbo that the actuator is attached too and tightened up a band clamp on my downpipe to solve my excessive cab smell during regen.

Last night I went to tune the truck and when done I tried to use 4x4 and it would not engage. I turned the hubs and still nothing. During the diagnostics check when you first turn the key the vaccuum pump doesn't fire up and if you turn the know from 2wd to 4wd I cannot hear the actuator in the tcase engaging like I can on my buddies 2008.

Any ideas what the problem could be? I suspect maybe a blown fuse for the vacccuum pump/4x4 circuit. I can't find my owners manual to check what fuse #. Could someone tell me where and what # the fuse is so I can check it?

thanks
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Old 01-08-2012, 06:15 AM
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Vacuum pump should only work when the truck is running. Sounds like the accurate is out. Check fuses first
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Old 01-08-2012, 06:17 AM
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Actuator **
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  #9  
Old 01-08-2012, 12:16 PM
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Quote:
Originally Posted by the-last-international View Post
Vacuum pump should only work when the truck is running. Sounds like the accurate is out. Check fuses first
I really hope it is a fuse and that the pump and actuator is on the same fuse
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  #10  
Old 01-08-2012, 09:18 PM
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Quote:
Originally Posted by the-last-international View Post
Vacuum pump should only work when the truck is running. Sounds like the accurate is out. Check fuses first
This is incorrect information. The vaccuum pump does work with the ignition in the start position. I pulled my 2 vaccuum lines up front (the little white box about 6" to the right of the Passenger battery) with the motor off and heard the whoosing sound of air. I then turned the key to the start position and the vaccuum pump fired up right away.

So its not my vaccuum pump.

I pulled my dash and unplugged and plugged the connector back in and that didnt make anydifference either....so its not a connection on the dash.

Tomorrow I try the fuses and relays.
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