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Message: [QUOTE="TreeMos20, post: 472474, member: 8350"] [b]01 350 ESOF problems[/b] Ok. 2001, F350, 7.3 diesel, Lariat. Noticed my ESOF 4x4 was not working, no light on dash, nothing. Then noticed my vents would only work on defrost. So did some research and ended up replacing the Hub lock actuator that connects to the vacuum pump, kinda forward of the actually vacuum pump. Still no 4x4 but the vents were working on all moods. then crawled under and found the plug connected to the front of the transfer case was loose, pushed it on tighter. turned key to aux and 4x4 only seemed to work on HI but then truck would not start just kept rolling over but would start and vacuum pump never turned off. crawled under and undid the plug on the transfer case, truck started fine, let run for awhile, then shut it off, put plug back on, truck started fine 4x4 (HI only) seemed to work but now the vents would only do defrost. Any ideas? can't seem to get 4x4 hi and low and vents to work. either a bad hub, which buy the way are manual and only go from lock to free, bad vacuum line, bad ESOF, or just bad connection at transfer case?? And what could be wrong with 4x4 low? Thanks for all the help in advance [/QUOTE]

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