Is 4x4 working ?
FTE Leadership Emeritus
Joined: Jul 2002
Posts: 42,561
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From: Long Island USA
Not true. The Superduty and Excursion transfer case is fully locked in 4x4, and has no internal differential.
Hotshot
Joined: Aug 2006
Posts: 17,398
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From: Whittier, CA
Right! If anyone doesn't believe it, try driving in 4WD on hard pavement - and learn the hard way. (don't do it)
Post Fiend
Joined: Mar 2009
Posts: 11,798
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From: Mt. Shasta California
I never said the t-case had a differential. All wheels act like a 2 wheel drive truck while locked in 4wd other the the u-joints as far as turning goes . Case closed for me on this.
Post Fiend
Joined: Mar 2009
Posts: 11,798
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From: Mt. Shasta California
And that is because of the u-joints. I guess you guys aren't reading closely.............case closed for me.
FTE Leadership Emeritus
Joined: Jul 2002
Posts: 42,561
Likes: 423
From: Long Island USA
And even if you didn't, what you said is NOT TRUE.
Originally Posted by EXv10
Any discrepancy beween the front and rear wheels on a turn will be absorbed by the the open differentials ability to allow for varying wheel speeds.
Posting Guru
Joined: Nov 2005
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From: Wyandotte, Michigan
Is the case closed for you? I'm not sure on this one.
Post Fiend
Joined: Mar 2009
Posts: 11,798
Likes: 14
From: Mt. Shasta California
???????????
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Post Fiend
Joined: Mar 2009
Posts: 11,798
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From: Mt. Shasta California
Case re-opened
After doing some research I see that you guys are right about the rear wheels and the front ones not turning the same RPMs on a turn. They do not follow exactly the same arc and this is why some or all of the all wheel drive cars have some type of differential between the front and the back wheels. Mouse over green light to see demo......... Sucks to be wrong 
HowStuffWorks "How Differentials Work"
HowStuffWorks "How Differentials Work"
FTE Leadership Emeritus
Joined: Jul 2002
Posts: 42,561
Likes: 423
From: Long Island USA
After doing some research I see that you guys are right about the rear wheels and the front ones not turning the same RPMs on a turn. They do not follow exactly the same arc and this is why some or all of the all wheel drive cars have some type of differential between the front and the back wheels. Mouse over green light to see demo......... Sucks to be wrong
HowStuffWorks "How Differentials Work"
HowStuffWorks "How Differentials Work"
Thread Starter
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Elder User
Joined: Mar 2006
Posts: 588
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From: Bellville TX. Wof Houston
ok update:
it seems that I was right and wrong. " and it looks like yall took the post and went WaCk0 "
when I tried it I was NOT in 4 wheel drv, even though the dash light said I was. it seems that there is a vac leak, somewhere or it takes MINE a few trys to get into 4 wheel drv.
however while in 4 wheel I was a bit surprised that the rear wheels would spin, " almost like NOT in 4X4 " on a gravel road. I own a landscaping co. and with the trailer connected and about 2 tons. is when I was testing it.
I figured that the front wheels would spin before the rear ones would.
I did get that. bucking and hard to steer while in 4x4.
once again thanks for everyone's reply, and I hope we all learned something.
I know I did
it seems that I was right and wrong. " and it looks like yall took the post and went WaCk0 "
when I tried it I was NOT in 4 wheel drv, even though the dash light said I was. it seems that there is a vac leak, somewhere or it takes MINE a few trys to get into 4 wheel drv.
however while in 4 wheel I was a bit surprised that the rear wheels would spin, " almost like NOT in 4X4 " on a gravel road. I own a landscaping co. and with the trailer connected and about 2 tons. is when I was testing it.
I figured that the front wheels would spin before the rear ones would.
I did get that. bucking and hard to steer while in 4x4.
once again thanks for everyone's reply, and I hope we all learned something.
I know I did
Post Fiend
Joined: Mar 2009
Posts: 11,798
Likes: 14
From: Mt. Shasta California
Front and back are probably both spinning on one side but you don't realize it, (if you are locked in the front). Last winter I was on some ice on a back road and I thought I wasn't engaged in the front but it was so slippery I couldn't tell. (open diff). That's why I say that you can get on a gravel road, step on the brake and the gas, spin the tires for 5 feet and get out to look at the tracks or you can have some watch your front wheels for you as they spin (or don't).
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