4X4 DOES NOT WORK IN AUTO POSTION BUT WORKS IN FINE IN LOCK POSITION

[sheyduk]

I'm a new member (first post), and I'm looking at buying a 2002 F350 long box, crewcab, dually. I had it inspected and one of the problems was that the 4x4 does not work when the hubs are in the auto position, but it works fine in the lock position. Does anyone know what the problem is, and approximately what it costs to fix?

[7004]

vac line ?

[ryandamo]

you have a vaccum leak somewhere. the hubs can either be activated manually or automatically, when they are activated automatically, an attached vaccum line engages them a leak in these lines or elsewere in the system would cause them to not work. check to see if your defroster works

[sheyduk]

How much does that cost to fix approximately? I haven't bought the truck yet as I wasn't sure if this would be something that would require some serious $ or just a few bucks, so I can not check the defroster.

[sheyduk]

A buddy just told me it could be the solenoid or a pump. Is that possible also?