Re: Slipping in 4x4 low
 

The reason Jerry asked about pavement is because if you have Jeep's Command
Trac 4-wheel drive system, it is strictly a part-time system that should
NEVER be used on dry pavement. The Command Trac system mechanically locks
the front and rear axels together. Since the front and rear axels turn at
different speeds, this system must only be used on slippery surfaces, like
snow, ice, mud, dirt, etc. If used on dry (or even wet) pavement, the
drivetrain will bind up and cause damage to u-joints, transfer case, etc.
You will actually feel the tires skidding and hear chirping, especially
during turns.

If you have Jeep's Select-Trac system, it has a full-time mode which can be
used on any surface, even dry pavement. It also has a part-time mode which
acts just like Command Trac.

If your transfer case selector lever has a full-time position, you have
Select-Trac.

Tom


<wedontdoit@hotmail.com> wrote in message
news:1134254276.281099.209850@g49g2000cwa.googlegr oups.com...
> >From: Jerry Bransford <jerr...@cox.net> -
> >
> >You're not by any chance feeling/hearing those symptoms while you are
> >driving on pavement are you?
> >
>
>
> Yes, it's on dry pavement. I first noticed what felt like binding in
> the rear, as I was stuck in a very long traffic jam (45 minutes of
> inching forward around a bend, up on a curved roadway), that would
> disappear as I shifted out of low (1-2 Automatic Transmission), into
> neutral. It went away as the road flattened out, but we decided to
> check all the gears, and that's when this was noticed. I never noticed
> it on the last 98 Cherokee Sport I had.
>
> Thanks for your help.
>
> Sheila
> Vancouver BC
>

Re: Slipping in 4x4 low
 

The reason Jerry asked about pavement is because if you have Jeep's Command
Trac 4-wheel drive system, it is strictly a part-time system that should
NEVER be used on dry pavement. The Command Trac system mechanically locks
the front and rear axels together. Since the front and rear axels turn at
different speeds, this system must only be used on slippery surfaces, like
snow, ice, mud, dirt, etc. If used on dry (or even wet) pavement, the
drivetrain will bind up and cause damage to u-joints, transfer case, etc.
You will actually feel the tires skidding and hear chirping, especially
during turns.

If you have Jeep's Select-Trac system, it has a full-time mode which can be
used on any surface, even dry pavement. It also has a part-time mode which
acts just like Command Trac.

If your transfer case selector lever has a full-time position, you have
Select-Trac.

Tom


<wedontdoit@hotmail.com> wrote in message
news:1134254276.281099.209850@g49g2000cwa.googlegr oups.com...
> >From: Jerry Bransford <jerr...@cox.net> -
> >
> >You're not by any chance feeling/hearing those symptoms while you are
> >driving on pavement are you?
> >
>
>
> Yes, it's on dry pavement. I first noticed what felt like binding in
> the rear, as I was stuck in a very long traffic jam (45 minutes of
> inching forward around a bend, up on a curved roadway), that would
> disappear as I shifted out of low (1-2 Automatic Transmission), into
> neutral. It went away as the road flattened out, but we decided to
> check all the gears, and that's when this was noticed. I never noticed
> it on the last 98 Cherokee Sport I had.
>
> Thanks for your help.
>
> Sheila
> Vancouver BC
>

Re: Slipping in 4x4 low
 

I think Jerry was asking if it was making the noise while on pavement in
4WD.
You shouldn't use 4WD on pavement unless you have Selec-Trac.
If you have Command-Trac, use only on slippery or loose surfaces.
-Brian

<wedontdoit@hotmail.com> wrote in message
news:1134254276.281099.209850@g49g2000cwa.googlegr oups.com...
> >From: Jerry Bransford <jerr...@cox.net> -
>>
>>You're not by any chance feeling/hearing those symptoms while you are
>>driving on pavement are you?
>>
>
>
> Yes, it's on dry pavement. I first noticed what felt like binding in
> the rear, as I was stuck in a very long traffic jam (45 minutes of
> inching forward around a bend, up on a curved roadway), that would
> disappear as I shifted out of low (1-2 Automatic Transmission), into
> neutral. It went away as the road flattened out, but we decided to
> check all the gears, and that's when this was noticed. I never noticed
> it on the last 98 Cherokee Sport I had.
>
> Thanks for your help.
>
> Sheila
> Vancouver BC
>

Re: Slipping in 4x4 low
 

I think Jerry was asking if it was making the noise while on pavement in
4WD.
You shouldn't use 4WD on pavement unless you have Selec-Trac.
If you have Command-Trac, use only on slippery or loose surfaces.
-Brian

<wedontdoit@hotmail.com> wrote in message
news:1134254276.281099.209850@g49g2000cwa.googlegr oups.com...
> >From: Jerry Bransford <jerr...@cox.net> -
>>
>>You're not by any chance feeling/hearing those symptoms while you are
>>driving on pavement are you?
>>
>
>
> Yes, it's on dry pavement. I first noticed what felt like binding in
> the rear, as I was stuck in a very long traffic jam (45 minutes of
> inching forward around a bend, up on a curved roadway), that would
> disappear as I shifted out of low (1-2 Automatic Transmission), into
> neutral. It went away as the road flattened out, but we decided to
> check all the gears, and that's when this was noticed. I never noticed
> it on the last 98 Cherokee Sport I had.
>
> Thanks for your help.
>
> Sheila
> Vancouver BC
>

Re: Slipping in 4x4 low
 

I think Jerry was asking if it was making the noise while on pavement in
4WD.
You shouldn't use 4WD on pavement unless you have Selec-Trac.
If you have Command-Trac, use only on slippery or loose surfaces.
-Brian

<wedontdoit@hotmail.com> wrote in message
news:1134254276.281099.209850@g49g2000cwa.googlegr oups.com...
> >From: Jerry Bransford <jerr...@cox.net> -
>>
>>You're not by any chance feeling/hearing those symptoms while you are
>>driving on pavement are you?
>>
>
>
> Yes, it's on dry pavement. I first noticed what felt like binding in
> the rear, as I was stuck in a very long traffic jam (45 minutes of
> inching forward around a bend, up on a curved roadway), that would
> disappear as I shifted out of low (1-2 Automatic Transmission), into
> neutral. It went away as the road flattened out, but we decided to
> check all the gears, and that's when this was noticed. I never noticed
> it on the last 98 Cherokee Sport I had.
>
> Thanks for your help.
>
> Sheila
> Vancouver BC
>

Re: Slipping in 4x4 low
 

Sheila, that's the problem... the kind of 4x4 system in your Jeep,
whether it's in 4Hi or 4Lo, is not supposed to be engaged when you're
driving on pavement. Your 4x4 system mechanically locks the front and
rear axles together so they are forced to rotate at the exact same RPMs
which won't work, since the front tires rotate faster than the rear
tires in normal driving conditions. Turning, driving on mild curves,
even just straight-ahead driving will bind up the drivetrain as the
front tires try to rotate faster than the rear tires.

Avoid using 4wd on pavement and it'll be fine, your particular 4x4
system is designed for offroad use only... or when the paved streets are
'totally' covered in snow or ice.

There are some 4x4 systems that are designed to be used on paved
streets, and it was optionally available on Cherokees like yours, but
those have an additional 4x4 mode called 4Full (full-time 4wd) which is
designed for street use. Unless your Cherokee has that mode available,
stay in 2wd when you're on a paved street. :)

Jerry

wedontdoit@hotmail.com wrote:
>>From: Jerry Bransford <jerr...@cox.net> -
>>
>>You're not by any chance feeling/hearing those symptoms while you are
>>driving on pavement are you?
>>
>
>
>
> Yes, it's on dry pavement. I first noticed what felt like binding in
> the rear, as I was stuck in a very long traffic jam (45 minutes of
> inching forward around a bend, up on a curved roadway), that would
> disappear as I shifted out of low (1-2 Automatic Transmission), into
> neutral. It went away as the road flattened out, but we decided to
> check all the gears, and that's when this was noticed. I never noticed
> it on the last 98 Cherokee Sport I had.
>
> Thanks for your help.
>
> Sheila
> Vancouver BC
>

--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.cox.net/jerrypb/

Re: Slipping in 4x4 low
 

Sheila, that's the problem... the kind of 4x4 system in your Jeep,
whether it's in 4Hi or 4Lo, is not supposed to be engaged when you're
driving on pavement. Your 4x4 system mechanically locks the front and
rear axles together so they are forced to rotate at the exact same RPMs
which won't work, since the front tires rotate faster than the rear
tires in normal driving conditions. Turning, driving on mild curves,
even just straight-ahead driving will bind up the drivetrain as the
front tires try to rotate faster than the rear tires.

Avoid using 4wd on pavement and it'll be fine, your particular 4x4
system is designed for offroad use only... or when the paved streets are
'totally' covered in snow or ice.

There are some 4x4 systems that are designed to be used on paved
streets, and it was optionally available on Cherokees like yours, but
those have an additional 4x4 mode called 4Full (full-time 4wd) which is
designed for street use. Unless your Cherokee has that mode available,
stay in 2wd when you're on a paved street. :)

Jerry

wedontdoit@hotmail.com wrote:
>>From: Jerry Bransford <jerr...@cox.net> -
>>
>>You're not by any chance feeling/hearing those symptoms while you are
>>driving on pavement are you?
>>
>
>
>
> Yes, it's on dry pavement. I first noticed what felt like binding in
> the rear, as I was stuck in a very long traffic jam (45 minutes of
> inching forward around a bend, up on a curved roadway), that would
> disappear as I shifted out of low (1-2 Automatic Transmission), into
> neutral. It went away as the road flattened out, but we decided to
> check all the gears, and that's when this was noticed. I never noticed
> it on the last 98 Cherokee Sport I had.
>
> Thanks for your help.
>
> Sheila
> Vancouver BC
>

--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.cox.net/jerrypb/

Re: Slipping in 4x4 low
 

Sheila, that's the problem... the kind of 4x4 system in your Jeep,
whether it's in 4Hi or 4Lo, is not supposed to be engaged when you're
driving on pavement. Your 4x4 system mechanically locks the front and
rear axles together so they are forced to rotate at the exact same RPMs
which won't work, since the front tires rotate faster than the rear
tires in normal driving conditions. Turning, driving on mild curves,
even just straight-ahead driving will bind up the drivetrain as the
front tires try to rotate faster than the rear tires.

Avoid using 4wd on pavement and it'll be fine, your particular 4x4
system is designed for offroad use only... or when the paved streets are
'totally' covered in snow or ice.

There are some 4x4 systems that are designed to be used on paved
streets, and it was optionally available on Cherokees like yours, but
those have an additional 4x4 mode called 4Full (full-time 4wd) which is
designed for street use. Unless your Cherokee has that mode available,
stay in 2wd when you're on a paved street. :)

Jerry

wedontdoit@hotmail.com wrote:
>>From: Jerry Bransford <jerr...@cox.net> -
>>
>>You're not by any chance feeling/hearing those symptoms while you are
>>driving on pavement are you?
>>
>
>
>
> Yes, it's on dry pavement. I first noticed what felt like binding in
> the rear, as I was stuck in a very long traffic jam (45 minutes of
> inching forward around a bend, up on a curved roadway), that would
> disappear as I shifted out of low (1-2 Automatic Transmission), into
> neutral. It went away as the road flattened out, but we decided to
> check all the gears, and that's when this was noticed. I never noticed
> it on the last 98 Cherokee Sport I had.
>
> Thanks for your help.
>
> Sheila
> Vancouver BC
>

--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.cox.net/jerrypb/

Re: Slipping in 4x4 low
 

Oops... guess that really wasn't such a good test then huh? I normally
only do run the 4x4 in snow or off road - my bad :-).
Thought since this Jeep was new to me, we should check and see if the
original binding sensation would repeat itself in 4x4 mode....then
discovered the slipping and was concerned.

Any clues as to the originally binding noise/feeling during the drive
on the curved road surface?

Thanks for everyone's input - very helpful guys!

Sheila
Vancouver BC

Re: Slipping in 4x4 low
 

Oops... guess that really wasn't such a good test then huh? I normally
only do run the 4x4 in snow or off road - my bad :-).
Thought since this Jeep was new to me, we should check and see if the
original binding sensation would repeat itself in 4x4 mode....then
discovered the slipping and was concerned.

Any clues as to the originally binding noise/feeling during the drive
on the curved road surface?

Thanks for everyone's input - very helpful guys!

Sheila
Vancouver BC