4x4 exepedition

[barrie1]

Some of the systems are vacumn operated. In doing the Brake Job he probably pulled the hubs which would break or damage the seals. Even the Chilton Books don't tell us everything.

[articsteve]

Expeditions use front CV shafts.  Where is a vacuum leak at the brake rotor?

[archer]

around wheel bearing
slider was size tech. use a torch  
drive side front caliper
seal in the wheel bearing.

[articsteve]

Archer, I think you are off course on this one.

From what I read, you say the silders on the drivers' side caliper were seized and the mechanic used a torch.

Well that is not going to ruin the seal in the wheel bearing.  If the wheel turns, makes no noise and you can not wabble the wheel by hand then the bearing is fine.

There is no vacuum that exists in a wheel bearing for 4wd purposes.

Lets start at the beginning.  Archer, get under the vehicle.  What drives the front wheels.  Solid axle or CV shafts.  Do you see rubber "boots"?

[archer]

CV SHAFT & BOOTS

[archer]

if you go in low gear 4x4
you hear the shaft engage in low gear still
no 4x4

[articsteve]

Well personally I'd lift the entire vehicle off the ground and then put it in drive and then around with the 4WD button.  I'd listen carefully for the electric transfercase motor to engage, etc. in both modes.  Perhaps it is a faulty shift motor.

If no engagement of the transfercase shift motor then I'd check for blown fuses.

If the motor engages then and still no 4wd then I would physically check all wheel sensors and then I'd go to a Ford Dealer and get an estimate ONLY.

I still think that the 4wd only engages when a computer senses that that one or both of the rear wheels slip.  It is a half ass 4wd system.  Most of the "on demand" systems are electronically governed.

Try banging on the shift motor with a hammer. Maybe it's seized from lack of use.

I'm out of ideas.

[archer]

Fuse are okay
you hear Transfercase engage in low 4x4  
but still no 4x4

[jeeper]

Archer stop by the closest ford dealer and tell them what is happening...
you'll spend some bucks but at least you will have the problem solved.

[ericthejet]

Now that was a can o' worms.  What does FORD stand for again?  First on race day?

[mrthompson]

FORD stands for STFU.

[barrie1]

I heard it was "Found On Road Dead".  

[mrthompson]

GM = Grandma's Mobile?

[Drivesideways]

I finally got around to reading this thread.  I'm thinking Archer is very close to accidentally writing an Expedition Haiku.  In case he doesn't here's mine....

Wheels  unengaging
Never happening before,
Expedition lost.

[archer]

Dealer found Problem . in transfere case fork
did not engage fully
adjustment to fork and it working

[articsteve]

Great, did they pull the transfercase to fix? or fix with transfercase in place?

How much did it cost?

[jeeper]

Archer i told u it would be much easier and lot less painful to take it to dealer...
good to hear its fixed.

[archer]

with transfercase in place.

[articsteve]

Great, much cheaper.

IMO, always best to give these things a try on your own first.  Outside places like Toronto, dealers charge about 100 bucks an hour tax in.  To net a 100 bucks an hour one must be pulling in about 150 bucks an hour gross.  So if you gotta a job that pays 150 bucks an hour I suppose you can run down to the dealer and get them to do all sorts of stuff as you are essentially trading one hour or your labour for one hour of theirs.  That's if you make that type of money

End of rant, back to topic.  That is why I so despise those electric motor driven transfercases that are advertised as "shift on the fly".  That is such BS. If it was the older mechanical activation system like found on Cherokees then many folks would feel the stress through the shift lever and most likely stop the vehicle or slow to a crawl.

I suspect the fork bent because the button was selected when the vehicle was going a fair clip.

Thanks for the reply.  Always good to know the reason.

BTW, did you ask them how the 4x4 high worked?  Is it an "on demand" system?  That is to say, after the 4 wheel high is engaged, do the front wheels only turn when the rears start to slip?

[jeeper]

funny i've always thought that the Expedition had the "On demand system" as first option on the button and then High and Low but those would  lock your differencial in 50%-50%....