No auto 4x4 - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 4 (permalink) Old 04-13-2015, 09:41 PM Thread Starter
The Muscle Hamster
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Location: NW Arkansas
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No auto 4x4

I have an automatic lariat with the 4x4 switch on the dash. When I switch it to 4x4, it does not engage the front at all. If I get out and lock the hubs, everything works fine. Any suggestions?

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post #2 of 4 (permalink) Old 04-14-2015, 05:58 AM
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Re: No auto 4x4

they are vacuum actuated. do you hear anything when you turn the switch? when were your balljoints changed last? the axle seals tend to dry out / crack causing a leak. not allowing them to lock automatically

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post #3 of 4 (permalink) Old 04-14-2015, 12:20 PM
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Re: No auto 4x4

Turn on the vents to full blast, turn on 4x4, if the vents switch to the defrost you have a vacuum leak. You have to check the lines to find it or you can use a drill bit driver to plug a certain hole that i cant remember to make them perma manual

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Originally Posted by Zmann View Post
it's a 6.0 nervous goes with it
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post #4 of 4 (permalink) Old 04-14-2015, 04:40 PM
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Re: No auto 4x4

if the vacuum doesn't work they are "perma manual" lol

common for the ESOF solenoid to fail along with the mentioned lines and knuckle seals

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