4x4 exepedition

[archer]

when i engage 4x4 litgh come on but it seem it not engaging

[mrthompson]

Hi Archer.

Can you give us some more info on the Expedition, etc.?  Do you let off on the throttle when you engage 4x4 (that is, while in motion)?  I find that I have to let off on the gas when I 'shift on the fly' with my Cherokee.

Also, it usually takes a few revolutions for most 'on the fly' 4x4 systems to engage.  Are you trying to engage 4x4 while stopped?

[archer]

truck at full stop engage 4x4 put in drive
litgh come on. but it feel only rear wheel are enguage

[mrthompson]

Try engaging 4x4 when you are coasting.  4x4 does not engage usually if there is much resistance in the drivetrain.  

[archer]

litgh showing 4x4 even showing L 4x4
but only rear wheel spining like a 2 wheel drive
never happen before

[jeeper]

take it to the dealer for a further investigation...

[articsteve]

That is an on demand system, very different than Command Trac or AWD found on Cherokees.

That Exped senses slipage from the rear diff or either wheel depending on LSD option.  Then it sends a message to supply torque to the front wheels thru the transfercase. So it could be a sensor (electricial) problem rather than a mechanical problem.

So it does look like some type of code reading will be required.  Other than that, pull all the rear wheels and inspect for loose wires or cruded up sensors.  Inspect the top of the diff.  Get out your WD40.

Go to google and find an Expendition BBS.

[saint_satan]

I'm not sure about the 4WD systems used in the expedition - whether they are "on-demand" or not.  I do know that in order to get a Ford Explorer into 4-Low it must be shifted from "Neutral" - it can't be engaged from "Park" or "Drive".  If the light is coming on for 4High but nothing is happening it could be something as simple as a switch or vacuum line.  Take it to a mechanic and you'll have your question answered quick.

[maritime_storm]

Why don't they make these things mechanical like they always did, instead of screwing around with unreliable electronic crap.

[maritime_storm]

Why don't they make these things mechanical like they always did, instead of screwing around with unreliable electronic crap.

[articsteve]

YA!, like when you want 4WD you pull a lever on the floor that mechanically activates the transfercase like on my 85 Suburban.  But now all you got are electronic buttons and "electric" shift motors and all that useless crap that is good for about 100,000 km and then it breaks at a totally stupid cost.

I think Jeep is the last to stay with some sort of mechanical linkage.

Rant:  And this shift on the fly BS is just that.  Stop the bloody vehicle if you need to change settings.  Shift on the Fly is a marketing thing the companies have got into to attract moron buyers that for some reason need little buttons to push instead of reaching down and using some bloody muscles and their brain to select a transfercase mode.  Consequently most 4WD systems are doomed to fail and what will I buy used when my 88 Cherokee finally rots away, but still leaving the best 4WD system behind laying on the ground?

Horrible.  Life is ending as we used to know it.

Now I get to strip a roof and shingle all day because I put this job off all summer.  It is -3C out.  Who is the moron?

[Mdxtasy]

Mechanical is the way to go.  All this electronic stuff is the devil.  Devil I say.  

It would be best if they reverted back to manual locking hubs, a crank in the front to start the car and manual roll up windows, air conditioning?  See manual windows. In fact, we should not only limit that to the auto sector.  We should go back to punch cards and drop this CD, DVD and digital storage hooplah.  We should also heat the home with a wood buring stove in the middle of the room.  TV?  Nooo....the AM radio was so much fun and entertaining.  

If only the world could stand still.....

[ovr50]

Md - you devil - you're so subtle this morning.

[maritime_storm]

Manual locking hubs I agree with, the rest sounds like you had caffeine this morning. With a manual transfer case when you{physically} pull it into gear, it's in their and you know it, if it doesn't shift it's because either the linkage has jammed or two gear teeth have pushed up against each and you'll need to pull ahead a bit to get it in gear, you don't need a scan tool or computer to find if it's actually in gear or why isn't.

[Mdxtasy]

(Message edited by mdxtasy on December 05, 2004)

[archer]

in order to get a Ford Ex. into 4-Low it must be shifted from "Neutral" - it can't be engaged from "Park" or "Drive".  the light are coming on for 4High but nothing is happening

[saint_satan]

The jeep Liberty still uses a manual transfer case lever.  It's kind cool to yank the lever up.  I would pay extra NOT to have a push button system.  More authentic...

[archer]

chilton repair said if rotor are removed for brake job a new o-ring must be replace
or you lose 4wheel drive . vaccum leak

[archer]

Thank you all for you replay
gone to libr. found it have to do with brake job. i had my brake last April. i have not use the 4z4 since brake job done.

[articsteve]

Good, thanks for the reply.  Sounds weird though.