Mechanics

FORD F-150 NOISE PROBLEM

2004 Ford F-150 • 160,000 miles

I have been hearing a noise from the front end like the 4x4 is trying to engage without me hitting the switch. I discovered that one of the vacuum lines has been disconnected at the check valve. Are there any vacuum routing diagrams for the 4x4 system out there?
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January 10, 2013.




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