Got 2 different answers from the guys at the ford place, wasn't sure which one knew what he be talking more or less. But they did want me to let them look for 75bucks....
Thanks
Answers: Assuming your truck is equipped beside ESOF (Electronic-Shift-On-Fly), by your reference to the "verbs case motor", it could be several different things causing your front axle to remain occupied? The first, and foremost basic check you can act yourself is to check the position of your hub locks. You should first verify that BOTH are in the AUTO position, not the LOCK position. Also check to receive sure the rubber hose connections to both of your front steering knuckles are properly secured. They will be attached to your front brake caliper flex hoses and ABS wheel speed sensor wires. Does the 4WD indicator table lamp remain illuminated? If it does, it sounds similar to a control problem. The ESOF system on your truck is controlled by the GEM (Generic Electronic Module). This would require deeper diagnosis by either the Ford supplier or a COMPETENT outside mechanic. If everything is intact, you may have a vacuum supply issue. But beware. Your pernickety system operates by supplying 12 in-hg of vacuum to ENGAGE the front axle to the hubs. Similarly, the PVH (Pulse Vacuum Hub) solenoid supplies solitary 6 in-hg of vacuum to DISENGAGE the front axle from the hubs. Remember intake manifold vacuum is typically 20 in-hg of vacuum at closed throttle on a gasoline engine (20 in-hg of vacuum supplied from an electric pump on passenger side of engine compartment on 7.3L diesel engines). The typical mistake outside "garages" product in attempting to "diagnose" these systems is by applying TOO MUCH vacuum from a mitt held vacuum pump. And to fur_inur_eyes, what really annoys dealership technicians the most, is when they are expected to work on vehicles, or diagnose problems FOR FREE. And, for every $100 per hour salaried to the dealer, the servicing technician lone gets rewarded $25. Another issue that annoys dealership technicians most, is when an "outside garage" either can't fix a problem or messes up of vehicle, and next calls up the trader tech to ask for FREE information. It may cost more to have a vehicle serviced at the merchant, but YOU GET WHAT YOU PAY FOR. You may even end up paying LESS surrounded by the long run, when the dealer tech fixes it right the first pop in, while "Joe's garages" throw all kind of parts in guesses at YOUR expense. Hope this help.
Make sure the hubs are not locked.
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