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  1. 6.4 Drivetrain Problems
    I bought a 2008 F450 4x4 about eight months ago. I clicked 4 wheel drive on for two seconds to make sure it worked. I haven't needed 4WD until the past week when it started snowing here. It will not engage 4WD unelss the truck is at a complete stop........once it is in four wheel drive it...
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