4X4 Excursion 2004
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4X4 Excursion 2004
Hey can anyone shed some light on this for me?
I bought a 2004 6.0l Excursion this summer, tried every thing and the 4 wheel high worked down the road, ect, never tried tight turns. Now when I use it all the time (Minnesota) and make small turns at slow speeds, the rig lops as it moves + you feel it in the steering wheel. My old truck was a expedition, and never did that. Is that normal or is it a broken/worn part.
I bought a 2004 6.0l Excursion this summer, tried every thing and the 4 wheel high worked down the road, ect, never tried tight turns. Now when I use it all the time (Minnesota) and make small turns at slow speeds, the rig lops as it moves + you feel it in the steering wheel. My old truck was a expedition, and never did that. Is that normal or is it a broken/worn part.
Hotshot
Joined: Oct 2005
Posts: 12,237
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From: Florida
I believe (could be wrong) the front axle has both wheels turning the same speed.
Going straight that's good and no issue.
In a turn though...the inside wheel actually needs to turn slightly slower to allow the outside wheel to cover more distance in the 'arc'...but it isn't since both wheels are mechanically tied together thru the differential...so the 'hop' is the inside wheel jumping if you will to make up MORE distance in rotation since it isn't covering the same pavement space...a limited slip front axle would fix that...but we don't have that...I may have this backwards...if I do I apologize...
On slippery surfaces (or low friction surfaces mud, wet grass, gravel, snow, ice)...you may not notice as much...but when turning as you described...although I normally notice the 'hop' when turning tighter...smaller turns don't normally make it hop...
My Exploder was the same too...
I guess defining how small a turn may help...also are you on snow up nort there?...like I said...with enough 'slip'...I normally don't feel the 'hop'.
Good luck!
joe.
Going straight that's good and no issue.
In a turn though...the inside wheel actually needs to turn slightly slower to allow the outside wheel to cover more distance in the 'arc'...but it isn't since both wheels are mechanically tied together thru the differential...so the 'hop' is the inside wheel jumping if you will to make up MORE distance in rotation since it isn't covering the same pavement space...a limited slip front axle would fix that...but we don't have that...I may have this backwards...if I do I apologize...
On slippery surfaces (or low friction surfaces mud, wet grass, gravel, snow, ice)...you may not notice as much...but when turning as you described...although I normally notice the 'hop' when turning tighter...smaller turns don't normally make it hop...
My Exploder was the same too...
I guess defining how small a turn may help...also are you on snow up nort there?...like I said...with enough 'slip'...I normally don't feel the 'hop'.
Good luck!
joe.
Hotshot
Joined: Oct 2005
Posts: 12,237
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From: Florida
Originally Posted by i eat hybrids
Great post joe. We learn somthing new everyday and u summed it up in a small post! hahah thanks!
Thanks guys!
joe.
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Originally Posted by X_Hemi_Guy
yeah I saw your other comment about my other post! LOL!...I've actually hit the 10,000 character limit more than a few times...go figure that too!
Thanks guys!
joe.
Thanks guys!
joe.
Thats a good thing cause i am to
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Sit. Stay.
Joined: Oct 2001
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From: Washington State
Actually it is NOT because the front wheels turn at the same rate...because they don't. You still have a differential up front.
It is because the rear wheels and the front wheels all turn at different speeds in corners but the drivetrain sends it all at the same speed.
The front wheels go in a different arc when turning versus the rear wheels. There is no means for that variation to be "absorbed" so to speak. If there was a vicious coupling at the transfer case all would be good. But it is mechanically locked. The difference has to come out somewhere and that somewhere is the wheel hop you get in tight turns.
It is because the rear wheels and the front wheels all turn at different speeds in corners but the drivetrain sends it all at the same speed.
The front wheels go in a different arc when turning versus the rear wheels. There is no means for that variation to be "absorbed" so to speak. If there was a vicious coupling at the transfer case all would be good. But it is mechanically locked. The difference has to come out somewhere and that somewhere is the wheel hop you get in tight turns.
Last edited by Monsta; Dec 6, 2007 at 11:06 PM.
Post Fiend
Joined: Sep 2005
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From: Ohio
mdgilles, i think ur truck doesnt do it because it has independent suspension and the excursion has a live axle up front. Guys correct me if i am wrong with that one. I dont really know because my truck isnt 4wd and i dont read alot about it
Sit. Stay.
Joined: Oct 2001
Posts: 18,308
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From: Washington State
The suspension type doesn't matter.
Some Expeditions have AWD. It may have been that in AWD the front wheels weren't engaged at that moment.
If it was in 2HI or 4LO and you didn't get hopping in tight turns then something wasn't working properly. It's a matter of physics why it does that.
Some Expeditions have AWD. It may have been that in AWD the front wheels weren't engaged at that moment.
If it was in 2HI or 4LO and you didn't get hopping in tight turns then something wasn't working properly. It's a matter of physics why it does that.
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A Ok
Hey Guys, I am making a trip through Glacier National Park soon. I had my local Ford guy check it out, didnt want to be stranded in the moutains. The service guy drove it, said it was a normal thing, and AOK.
Thanks for the feedback
Thanks for the feedback