4WD Malfunction - Ford Powerstroke Diesel Forum

 
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post #1 of 6 Old 03-25-2013, 11:32 AM Thread Starter
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4WD Malfunction

When I purchased my 6.4 this last fall, I noticed something was funky regarding the 4WD. When I use the electronic 4WD switch, it doesn't engage. Even when I put it into neutral, switch into 4WD, it still doesn't engage. When Im going down the road and I switch it into 4WD (which I don't usually do. Usually stop completely and switch), it grinds for a second, and not sure if it still kicks in.

I usually just rely on the trusty manual lock-in on the hubs, however, it'd be kind of nice to not have to lock it in. Not sure if this could be an electronic component or something different. Any help would be appreciated. Thanks!
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post #2 of 6 Old 03-25-2013, 11:47 AM
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Is your 4wd light come on? It sounds like you have a vacuum leak if you are able to manually lock hubs in and use 4x4.

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post #3 of 6 Old 03-25-2013, 11:51 AM Thread Starter
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Yes, the light comes on the dash. Are those leaks usually fairly inexpensive to fix? Just weighing my options... If it's too expensive, I'll just leave it as it is and lock in the hubs.
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post #4 of 6 Old 03-25-2013, 02:30 PM
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If it's leaking at the hubs, it's pretty pricey to fix. However, vacuum leaks are common and in the system and aren't super expensive to fix. I had a cracked hose and it was a couple hundred to fix. Labor was the costly part of the repair. The parts were cheap. Like said above, a free option to engage 4x4 is to manually lock the hubs. If you have a vacuum leak, you should be able to hear it cycling when you engage 4x4.

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post #5 of 6 Old 03-25-2013, 04:09 PM
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4WD Malfunction

If its a cracked hose anyone can fix it no need for a shop to do it, just by the hose and 2 new clamps and replace!


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post #6 of 6 Old 03-25-2013, 04:24 PM
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Mine seems to engage in 4wh light comes on but not 4wl

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