"Masterbiscuit" <masterbiscuitnospamorviruses@hotmail.com> wrote in message
news:Fi1fb.17829$E95.2672852@news4.srv.hcvlny.cv.n et...
> Hi Jeff,
> I was always under the impression that if you
> go 4wd on hard pavement, tis ok AS LONG AS
> you do not do any turning. If it's a straight stretch
> and smoothly paved, there really shouldn't be any
> bind, no?
>
That is true to the point that the front and rear axles have the same size
tires (worn the same, not the same size, per se) and are geared the same
(the 4.10 gearing of the rear is 4.11 on the front). These differences are
small, but real. The tires can slip on the ground to disipate the resulting
stresses that come from the small differences, but the stress are not
disipated on the street, and they build up in the tcase, and the tcase can
let go with a bang when that happens.

There will be less stress on a straight road, this is true, but that only
means the bang will be smaller.


> Judging by the post though, it SOUNDS like he
> has some bind coming out of 4wd. But my guess
> (just a guess ;-) is that it's just in need of some lubing.
>
> Maybe a better test would be for him to go on some
> grass, or gravel, and check it that way..
>
> Also, I think shifting into 4wd (high only) at 50 is
> just fine. Although I think it's in the upper end of
> the limitations there. I usually drop to about 40
> if I'm going to do a "shift on the fly"
>
I don't think the speed has anything to do with the "problem" either, except
that 4WD for 10 seconds at 20 is not nearly as far as 4wd for 10 seconds at
55, so any difference in the tires and axle gearing will be compounded by
the time quicker at that speed than if the speed was only 20 on the same
road surface.

I forgot to shift out of 4WD one day when I first got my Jeep, and as I
approached 45 and went to shift, the front locker and the tcase got together
and sent me across the road, and the steering wheel fed me some input that
the drivetrain was not happy at all. My immediate selection of 2WD was
smooth and effortless, but the gear driven D300 tcase works much differently
than the chain driven NP231. I would not be surprised if the chain caused a
loud clunk when it was released.

 

"Masterbiscuit" <masterbiscuitnospamorviruses@hotmail.com> wrote in message
news:Fi1fb.17829$E95.2672852@news4.srv.hcvlny.cv.n et...
> Hi Jeff,
> I was always under the impression that if you
> go 4wd on hard pavement, tis ok AS LONG AS
> you do not do any turning. If it's a straight stretch
> and smoothly paved, there really shouldn't be any
> bind, no?
>
That is true to the point that the front and rear axles have the same size
tires (worn the same, not the same size, per se) and are geared the same
(the 4.10 gearing of the rear is 4.11 on the front). These differences are
small, but real. The tires can slip on the ground to disipate the resulting
stresses that come from the small differences, but the stress are not
disipated on the street, and they build up in the tcase, and the tcase can
let go with a bang when that happens.

There will be less stress on a straight road, this is true, but that only
means the bang will be smaller.


> Judging by the post though, it SOUNDS like he
> has some bind coming out of 4wd. But my guess
> (just a guess ;-) is that it's just in need of some lubing.
>
> Maybe a better test would be for him to go on some
> grass, or gravel, and check it that way..
>
> Also, I think shifting into 4wd (high only) at 50 is
> just fine. Although I think it's in the upper end of
> the limitations there. I usually drop to about 40
> if I'm going to do a "shift on the fly"
>
I don't think the speed has anything to do with the "problem" either, except
that 4WD for 10 seconds at 20 is not nearly as far as 4wd for 10 seconds at
55, so any difference in the tires and axle gearing will be compounded by
the time quicker at that speed than if the speed was only 20 on the same
road surface.

I forgot to shift out of 4WD one day when I first got my Jeep, and as I
approached 45 and went to shift, the front locker and the tcase got together
and sent me across the road, and the steering wheel fed me some input that
the drivetrain was not happy at all. My immediate selection of 2WD was
smooth and effortless, but the gear driven D300 tcase works much differently
than the chain driven NP231. I would not be surprised if the chain caused a
loud clunk when it was released.

 

That was always how I looked at it.
If you hear a loud clunk, if it's hard to
get out of 4wd, you've had some bind.

Before my Cherokee, I had a (cough)
Geo Tracker. Yea, the small one. Not as
bad as you may think.,.lol

That thing was light enough where the tires
would scrub a little if you were in 4wd and
went from slippery to dry. So I'd leave it in
during those conditions.

With the Cherokee, I wouldn't do that. The
weight is so much more that I don't think there'd
be ANY scrub.

Come to think of it, my t-case needs a little use
these days also. Winter's on the way, and I haven't
used 4wd in a good while..


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That was always how I looked at it.
If you hear a loud clunk, if it's hard to
get out of 4wd, you've had some bind.

Before my Cherokee, I had a (cough)
Geo Tracker. Yea, the small one. Not as
bad as you may think.,.lol

That thing was light enough where the tires
would scrub a little if you were in 4wd and
went from slippery to dry. So I'd leave it in
during those conditions.

With the Cherokee, I wouldn't do that. The
weight is so much more that I don't think there'd
be ANY scrub.

Come to think of it, my t-case needs a little use
these days also. Winter's on the way, and I haven't
used 4wd in a good while..


---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.516 / Virus Database: 313 - Release Date: 9/1/2003

 

That was always how I looked at it.
If you hear a loud clunk, if it's hard to
get out of 4wd, you've had some bind.

Before my Cherokee, I had a (cough)
Geo Tracker. Yea, the small one. Not as
bad as you may think.,.lol

That thing was light enough where the tires
would scrub a little if you were in 4wd and
went from slippery to dry. So I'd leave it in
during those conditions.

With the Cherokee, I wouldn't do that. The
weight is so much more that I don't think there'd
be ANY scrub.

Come to think of it, my t-case needs a little use
these days also. Winter's on the way, and I haven't
used 4wd in a good while..


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Outgoing mail is certified Virus Free.
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Isn't 4WD High meant for higher speed wet pavement or snow?

"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:3F7C95EA.1F331EEC@***.net...
> Hi Joe,
> Apples and oranges, your transfer is made to run on pavement.
> Mustang drivers become squirrels in the rain, especially the ones
> powered by four cylinders.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Joe wrote:
> >
> > I would agree with you if only talking about 4WD LOW. 4WD High is
another
> > matter. My Subaru is WD and I have NEVER fishtailed, slid, slipped, etc
on
> > wet roads. Every 2WD car I've owned will slip and slide on wet pavement
(I
> > like watching Mustangs in the rain). 4WD increases the odds of a tire
> > finding a non-slick surface...

 

Isn't 4WD High meant for higher speed wet pavement or snow?

"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:3F7C95EA.1F331EEC@***.net...
> Hi Joe,
> Apples and oranges, your transfer is made to run on pavement.
> Mustang drivers become squirrels in the rain, especially the ones
> powered by four cylinders.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Joe wrote:
> >
> > I would agree with you if only talking about 4WD LOW. 4WD High is
another
> > matter. My Subaru is WD and I have NEVER fishtailed, slid, slipped, etc
on
> > wet roads. Every 2WD car I've owned will slip and slide on wet pavement
(I
> > like watching Mustangs in the rain). 4WD increases the odds of a tire
> > finding a non-slick surface...

 

Isn't 4WD High meant for higher speed wet pavement or snow?

"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:3F7C95EA.1F331EEC@***.net...
> Hi Joe,
> Apples and oranges, your transfer is made to run on pavement.
> Mustang drivers become squirrels in the rain, especially the ones
> powered by four cylinders.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Joe wrote:
> >
> > I would agree with you if only talking about 4WD LOW. 4WD High is
another
> > matter. My Subaru is WD and I have NEVER fishtailed, slid, slipped, etc
on
> > wet roads. Every 2WD car I've owned will slip and slide on wet pavement
(I
> > like watching Mustangs in the rain). 4WD increases the odds of a tire
> > finding a non-slick surface...

 

Hi Joe,
I can't use the term "higher speed" with a part-time transfer case,
we drive just fast enough to get through a low traction snowed in road.
If I have traction I use two wheel, because my Ford 9" and Dana 44 are
not the same ratio from the factory in my Bronco, I could blow it up in
a hundred feet of wet pavement with good traction. Your Subaru is
full-time 4WD, "All Wheel Drive":
http://auto.consumerguide.com/auto/e...?act=feature06
and has a center differential between the drive shafts to relieve the
bind.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Joe wrote:
>
> Isn't 4WD High meant for higher speed wet pavement or snow?

 

Hi Joe,
I can't use the term "higher speed" with a part-time transfer case,
we drive just fast enough to get through a low traction snowed in road.
If I have traction I use two wheel, because my Ford 9" and Dana 44 are
not the same ratio from the factory in my Bronco, I could blow it up in
a hundred feet of wet pavement with good traction. Your Subaru is
full-time 4WD, "All Wheel Drive":
http://auto.consumerguide.com/auto/e...?act=feature06
and has a center differential between the drive shafts to relieve the
bind.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Joe wrote:
>
> Isn't 4WD High meant for higher speed wet pavement or snow?