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Message: [QUOTE="Redpower, post: 1149130, member: 923"] Got a new to me 2007 F250 a couple weeks ago. Through trial and error I found that my 4wd was not working when my hubs were in auto. When I lock them in "lock" the 4wd works fine. I hooked in a vac gauge after the solenoid and it goes up to 12in and holds for about 30 seconds until something lets the vacuum out. I don't think I have any leaks going to the hub as it holds and dumps it all off at once. Once it dumps the vacuum off my pass side hub unlocks. I replaced the solenoid and the new one does the same thing. Video shows the gauge and you can hear the pump running. Where do I need to look next? [ATTACH=full]147516[/ATTACH] [/QUOTE]

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