4x4 not engaging - Ford Powerstroke Diesel Forum
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post #1 of 11 Old 03-08-2013, 04:23 PM Thread Starter
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4x4 not engaging

hey guys, a few times last week when i would go in the back country sledding id go too put my truck in 4x4 and it wouldnt engage! i would hear a sound in the front drivers side like somethings trying too happen. id then go front and back and keep trying it and it would start working. any ideas? sucks i had too get pulled off a hill by my buddys cummins..lmao thanks
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post #2 of 11 Old 03-08-2013, 04:30 PM
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Believe it or not it was emissions!!

I had an issue when my trucks (2008 F250) 4x4 would not engage. I took it to the dealer and they hooked it up to the computer and saw where a failure was logged. After a week of investigating they found that there was some type of switch that was covered under the emissions warranty being the culprit. I was surprised but after they replaced the faulty part she goes into 4x4 with no problem.

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post #3 of 11 Old 03-08-2013, 04:40 PM
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You didnt happen to try locking your hubs in manually by chance did you? Mine quit working when in autolock, but worked when i turned the hubs to manual. Anyway mine ended up being a bad vacuum line and also a 4wd sensor.
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post #4 of 11 Old 03-08-2013, 04:44 PM
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Sure did. I was on a boat ramp and needed the 4x4 because it was slippery. When my switch inside failed I went outside and manually engaged the hubs. Worked perfectly but I was pissed. It was last Summer and my truck only had 35K miles at the time. I was disappointed but you know how it goes.

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post #5 of 11 Old 03-08-2013, 05:06 PM
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Like Smokey said, vacuum leak is the the most common culprit.

2013 Lariat Eco-Boost F150 Super Crew 4x4 5K Miles. Max-Tow 3.73's, luxury package


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post #6 of 11 Old 03-19-2013, 01:59 PM
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If you manually locked it, and it made a sound probably only one side locked and the other didnt. Happened to me on another superduty, gave it a kick and it locked. your lock is probably sticking and not allowing it to pop in. have you checked the bearing inside? The grease inside dries up, and eventually your bearing will fail.
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post #7 of 11 Old 03-19-2013, 02:53 PM
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I haven't owned a truck yet where auto hubs work always gotta lock um in once the truck gets over a year old

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post #8 of 11 Old 03-19-2013, 02:56 PM
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Agree, Thats why i just disconnected my vac and just get off the truck to lock the hubs now. It just sucks when your dressed up in a nice suit and pants, and decide to go wheeling in some muddy terrain before the party. haha
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post #9 of 11 Old 11-07-2013, 10:18 PM
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Hey there, where was the 4wd sensor that you replaced? I put in a new solenoid and vac lines dont leak but auto hubs still dont engage.

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post #10 of 11 Old 11-08-2013, 01:52 AM
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Vac line

I took it back to the dealer and they replaced the vac line. Started working fine and the problem has not returned. Let the dealer fix it since it was still under warranty.

Chris Brown
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