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Message: <blockquote data-quote="BigBlackRaptor" data-source="post: 2017428" data-attributes="member: 49132">Alrighty, so some interesting findings.Decided to go for a drive with a camera mounted to the underside of the truck to see if I could capture what was going on. I was monitoring the live video feed on my hour plus drive and the entire time, both CV shafts were spinning at wheel speed as well as the transfer case drive shaft.No noise on the freeway, about 40 miles one way. I got to my destination and as soon as I hit uneven ground (gravel patch on the side of the road) the noise comes back.Looking back at the video, the passenger IWE / CV seems to disengage at the time of the noise, and noise goes away after re-engaging (Big clunk noise).Immediately I am thinking IWE after seeing video. I go back home and jack up the front of the truck to begin my vacuum test. Here are my readings starting from the beginning of the system and working my way down:- Vacuum reservoir pulls vacuum - 25 inch pounds- Check valve works (Brand new installed yesterday)- Solenoid works (Brand new installed yesterday)- Vacuum pressure measured at solenoid - 25 in pounds- Used the hand pump to create 25 in pounds of vacuum at the top of the vacuum line where it connects to solenoid. Held 25 pounds for 2 minutes. Checks out, moving on.- Turned truck back on. Pulled the vacuum line from both IWEs and it measured 25 in pounds on both sides.Heres where it gets interesting.Hooked up the vacuum to the IWE directly and maxed out the hand pump at 27 pounds. Both IWEs will hold that pressure for 2 minutes BUT when I try to spin the wheel on both sides, the CV shaft still spins with the speed of the wheel, even with vacuum applied. How in the hell do BOTH IWE's fail at the exact same time and have the exact same problem where seemingly no amount of vacuum will disengage them from the axles? This makes more sense as to why both CVs and the transfer case drive shaft were all spinning in unison for my entire drive but I am extremely concerned with how much damage this may have caused. Anyone hear of this happening before? [USER=35543]@FordTechOne[/USER] any ideas?Heres the video[MEDIA=youtube]dAOL1MeyDTM[/MEDIA]</blockquote>

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