That's what I was afraid of, cbradford.

Do you have any pictures of Mile Markers installed with the Limited wheels?

 

I have the OE hubs, but I have seen pictures here before in one of the many threads on this issue.

 

The ESOF works when I turned the dash dial to 4x4 high with the hubs in Auto because the EX got out of being stuck in the snow in 2 wheel drive.

Now After I turned the hubs to lock the EX REALLY had traction in the snow.

I have used 4 wheel drive more in the last 3 weeks sine I got it in 2004.

 

That doesn't make any sense. The switch on the dash is supposed to engage the t-case and send a vacuum signal to the hubs to automatically lock them in. If you had to turn them manually to lock them then they are not working properly.

 

So my question is" Why is there even a LOCK position on the hubs?" It does have additional traction with the dash switch on in the HIGH position ,but it seemed better with the addition of the hubs in the LOCK position.

 

The lock position on the hub is there in case the vacuum system fails. Trouble is that the dial itself will freeze up and be unable to turn.

Try this test. Turn both hubs to auto and leave the switch in 2wd. Reach behind the wheel/tire and try turning the axle shafts on both sides by hand (turn the u-joint). They will be free to turn when the hubs are not locked in (as they should be when in auto and 2wd). Then start the vehicle up and turn the switch on the dash to 4wd. You should drive forward a bit to ensure engagement. Turn the vehicle off and again try to manually turn the axle shafts. You should not be able to turn them now. If you still can, the ESOF vacuum system has failed. This is why they have the lock position. Note that the system has many other failure modes than just this one. One hub can lock and the other not (this is bad). They can be stuck locked when the dial is in auto (this is common). And the dial can be froze up (as mentioned before). Try this test and let us know what you find.

 

Also; for a quick test, go to a gravel road, stop and hit the gas to spin the rear tires, do your adjustments and try it again. It will noticibly lurch forward when it is in FWD. You must creep about 10 feet after your first little burn out to make sure it is engaged though.

 

Does it do any good to grease the hubs. Can that be ddone relatively easy. I need pilers to manually lock the hubs in and the auto 4X4 doesn't seem to be doing muck. I have never greases the hubs.

 

andy

The right way to fix is explained in detail on Guzzel's page (see earlier post in this thread).

If you need to manually lock auto hubs then the vacuum system is not working.

IF you have trouble turning the dial, WD40 may help as explained above.

There are a lot of possible failure modes for the ESOF system; some you can work around by locking the hubs manually. If that works, there's little to be gained from aftermarket hubs, except that you can expect new hubs to not fail further, at least for a number of years.

 

my dash lights come on, but 4WD wont turn on, and what if I can only turn one of the wheel hubs to manual, the other stuck, well turning just one to manual work?
thanks for your help.

 

No both will need to be locked.

 

thanks allot

 

You can unstick that stuck one by soaking in in penetrating oil or taking it apart and replacing the o-ring. They both need to be locked to work.

 

thanks allot, thats what I did,( W-D 40) and it worked, thanks, Another question, but you still have to turn it on the 4x4 in the truck right? from 2x4 ro the 4x4 high?
Thanks Again

 

Same thing happened to me, whats going on ?
When switch my 4WD on the fly to 4W High nothing happens. It does not even show on the instrument cluster that it is on.