I am: Ben
My Rig: 2004 Ford F150
Join Date: Jan 2014
4x4 Problem 2004 F150 help
I have a 2004 F-150 5.4L (160,000 miles) with a problem with its 4 wheel drive. I recently replaced both bearings and actuators on the front end with OEM parts, but recently I have discovered that the vacuums that engage and disengage the 4 wheel drive will not turn off causing the truck to stay in 2 wheel - this has been a problem even before parts were replaced. When the tubes that are connected to the bearing/actuator are removed the 4x4 kicks on. Any information on this problem would be greatly appreciated.
Last edited by 2004 F150; 01-06-2014 at 06:27 PM.
I am: Kevin
My Rig: 2016 F150 Lariat
Join Date: Jan 2011
Location: Arlington, WA
There are some vacuum valves that get wet and then need to be replaced. I believe they are on the firewall on the passenger side.
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