LOCKED IN 4WD!

[WOOL-PULLER]

my truck is locked in 4wd! i have shift on the fly and the sw is in 2wd. front driveshaft still turning.
also, for the last few months, when i put my truck in 4wheel the a/c shift from blowing out the vents to blowing out the defrost!!! a few minutes later it fixes itself.
any help?
04' F350 CC DRW long bed

[TwinTurboStroker]

Well if your front drive shaft is spinning then I would pull it off to avoid damage....it sounds like you have a short somewhere or your actuator has gone bad.....a tech should be along shortly to help

[strokermann]

you have vacum leak some were. just remove the old hubs and install some warns so youknow when you are locked in and out of 4wd.

[Heat]

Yep, it's a vacuum leak. The A/C vent system uses the same vacuum system as the rest of the truck (i.e. hub locks)...

Ken....

[bigcountrysg]

Your front driveshaft is turning because your hubs are still locked in. Now you can try driving in reverse for a distance of about 15-20 as it says in the owners manual to release the hubs. If that does not work then you will have to take the hubs apart clean them regrease them and reinstall them. Most likely your t-case is in 2wd.

[WOOL-PULLER]

appreciate the responses. thats what i was told. i took it in and they replaced a solonoid or something at the trans case. still wouldnt unlock the hubs. the tech got it out of 4wd somehow so i could drive in 2wd and next week i will put some new hubs in.

[alabamafrog]

I have no clue if the 6.0 is the same but here is how the older truck 4x4 system works Auto Locking Hubs/Vacuum Problem

Yours sounds like one of the hub seals is bad and not letting the proper amount of vacuum build in the hub before the solenoid times out and denergizes. The new seal for mine is around $30 and I replaced them while changing all 4 ball joints, took 1/2 a day and I had to make a tool out of a 6x6 block to drive the front axles and seals into the hubs. It was a bit of a pain.

If anyone wants their auto hubs to work like warn manual hubs all they have to do is unplug the regulator on the right fender and the hubs will work manually and tottaly independent of the dash switch and transfer case.

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Last edited by alabamafrog : 09-22-2007 at 02:07 PM.

[Raul@Stealth Automotive]

mine is doing the same thing... i took out the front driveshaft and im gonna upgrade to some warn hubs so i can eliminate the auto lock hubs....