2003 Ford F 250 Ever Since Locked Hubs Into 4wd Bad Vibration Around 40 Mph Idle

2003 FORD F-250
112,000 MILES
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Ever since I locked my hubs into 4wd I have a bad vibration at around 40 mph and at idle it shakes intermittently. Need some help! F250 5.4l v8 gas
Dec 31, 2012 at 3:51 PM
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RACEFAN966
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Check the vacuum lines and such for locking the 4x4 system, you may just have a slight vacuum leak. As for the vibration is it in the truck or the front end??
Dec 31, 2012 at 5:03 PM
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