Question about 2003 Ford F250 Super Duty Crew Cab
My 03 f-250 7.3 liter will not switch to 4x4 auto, I have to manually lock the hubs and they have gotten very tight. I sucpect vacuum issue but not sure
This has happened a couple of times on my truck. I have had a couple of vacum lines replaced. The lines were chewed thru by mice. After repair hubs lock and unlunk just fine.
Posted on Jul 31, 2008
Most likely vacuum problem. Does the A/C blow out of the correct location? i.e if you have it set to vent does it blow out of the vents? If not, then you have a vacuum leak somewhere. The vacuum lines to the autolock hubs is a common problem.
Posted on Jun 23, 2008
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Posted on Jan 02, 2017
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Dec 12, 2014 | 2003 Ford F250
Feb 28, 2013 | Cars & Trucks
If your 4X4 is making a grating or clicking noise from beneath the front wheels, the hubs need to be checked to make sure they are locking properly. To test this on a car with automatic hubs, rotate the front axle shafts under the truck. If, after a few turns, the axle locks up and can no longer be turned, the automatic hub is working properly. If, however, the axle does not lock up and you are able to continue rotating it, the hub is either bad or in need of a good cleaning.
To test a car with manual hubs, make sure the 4X4 is off and rotate the axle until it locks up. Again, if the axle does not lock up, the hub is not working or in need of a cleaning.
To determine if the automatic hub is no longer working, take the car out of 4X4 mode and rotate the axle shaft. If the axle does not lock up after a number of revolutions, the hub is most likely not working at all. Repeat this with the other axle shaft. On a car with manual hubs, disengage 4X4, lock in the hubs, and attempt to rotate the axle shafts. If they can be rotated at all, the hub is not working. Repeat this with the other axle shaft.
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