4x4 no work
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Junior User
Joined: Aug 2007
Posts: 51
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4x4 no work
Hi Guys,
Back to the well for more advice. I have my work truck in the field and my guys report that 4x4 isn't working - it isn't working in Low or High.
This truck is a 97 F-350 with factory auto hubs - 215K on the odometer and Auto Transmission.
I am trying to diagnose from afar. 4x4 light work correctly for high and low. Shift lever feels normal in moving from 2wd to 4H to 4L.
I read another post where someone recommended trying the heater and blowing air to the floor - apparently if the air goes to the defroster instead, it means you have a vacuum leak and then the hubs wouldn't engage - can anyone confirm the validity of this test? The air blew on the floor when I had my guys try this.
Any and all help in diagnosing from afar (can't afford much downtime when it comes home) is appreciated. Thanks!
Back to the well for more advice. I have my work truck in the field and my guys report that 4x4 isn't working - it isn't working in Low or High.
This truck is a 97 F-350 with factory auto hubs - 215K on the odometer and Auto Transmission.
I am trying to diagnose from afar. 4x4 light work correctly for high and low. Shift lever feels normal in moving from 2wd to 4H to 4L.
I read another post where someone recommended trying the heater and blowing air to the floor - apparently if the air goes to the defroster instead, it means you have a vacuum leak and then the hubs wouldn't engage - can anyone confirm the validity of this test? The air blew on the floor when I had my guys try this.
Any and all help in diagnosing from afar (can't afford much downtime when it comes home) is appreciated. Thanks!
Posting Guru
Joined: Feb 2008
Posts: 1,354
Likes: 0
your hubs could be shot. my truck had autos and the driver side got stuck half way so it popped real hard in 4 wheel but did nothin in 2. it turned out it blew so it got stuck. i did a manual hub conversion from Warn for $317
