ABS vs Part-Time 4x4 ?
 

I've got a Jeep Grand Cherokee and this issue of anti-lock brakes
functionality came up with regards to the use of Part-Time 4x4 in snowy
weather.

We know how Part-Time mode operates on the four wheels. Given that, how
does this affect a vehicle with anti-lock brakes, since ABS monitors the
rotation of each wheel? If all four wheels are moving at the same rate,
don't you lose the ability of the ABS to independently monitor each
wheel speed and brake optimally/properly on a slippery surface that may
NOT affect all four wheels?

Jim

Re: ABS vs Part-Time 4x4 ?
 

Dunno about a GC ... but my Subaru had 4 channel ABS and AWD. The ABS simply
prevents any wheel from locking when braking thus retaining full steering
ability ... geez that was well put ... if only I could talk that good in the
real world.

"Jim Y." <jjy0912@hotmail.com> wrote in message
news:fO1Dd.4931$Vj3.4501@newssvr17.news.prodigy.co m...
> I've got a Jeep Grand Cherokee and this issue of anti-lock brakes
> functionality came up with regards to the use of Part-Time 4x4 in snowy
> weather.
>
> We know how Part-Time mode operates on the four wheels. Given that, how
> does this affect a vehicle with anti-lock brakes, since ABS monitors the
> rotation of each wheel? If all four wheels are moving at the same rate,
> don't you lose the ability of the ABS to independently monitor each
> wheel speed and brake optimally/properly on a slippery surface that may
> NOT affect all four wheels?
>
> Jim
>

Re: ABS vs Part-Time 4x4 ?
 

Dunno about a GC ... but my Subaru had 4 channel ABS and AWD. The ABS simply
prevents any wheel from locking when braking thus retaining full steering
ability ... geez that was well put ... if only I could talk that good in the
real world.

"Jim Y." <jjy0912@hotmail.com> wrote in message
news:fO1Dd.4931$Vj3.4501@newssvr17.news.prodigy.co m...
> I've got a Jeep Grand Cherokee and this issue of anti-lock brakes
> functionality came up with regards to the use of Part-Time 4x4 in snowy
> weather.
>
> We know how Part-Time mode operates on the four wheels. Given that, how
> does this affect a vehicle with anti-lock brakes, since ABS monitors the
> rotation of each wheel? If all four wheels are moving at the same rate,
> don't you lose the ability of the ABS to independently monitor each
> wheel speed and brake optimally/properly on a slippery surface that may
> NOT affect all four wheels?
>
> Jim
>

Re: ABS vs Part-Time 4x4 ?
 

Dunno about a GC ... but my Subaru had 4 channel ABS and AWD. The ABS simply
prevents any wheel from locking when braking thus retaining full steering
ability ... geez that was well put ... if only I could talk that good in the
real world.

"Jim Y." <jjy0912@hotmail.com> wrote in message
news:fO1Dd.4931$Vj3.4501@newssvr17.news.prodigy.co m...
> I've got a Jeep Grand Cherokee and this issue of anti-lock brakes
> functionality came up with regards to the use of Part-Time 4x4 in snowy
> weather.
>
> We know how Part-Time mode operates on the four wheels. Given that, how
> does this affect a vehicle with anti-lock brakes, since ABS monitors the
> rotation of each wheel? If all four wheels are moving at the same rate,
> don't you lose the ability of the ABS to independently monitor each
> wheel speed and brake optimally/properly on a slippery surface that may
> NOT affect all four wheels?
>
> Jim
>

Re: ABS vs Part-Time 4x4 ?
 

Darned few Grand Cherokees have a part-time 4x4 system, are you sure
your Grand Cherokee has a Selectrac system that includes the part-time
4x4 mode? And a part-time 4x4 system does not lock the wheels together
so they are in "lock-step" with each other, the part-time 4x4 system
only locks the front and rear axles together...so tires are still free
to lock up on one side.

Jerry

Jim Y. wrote:
> I've got a Jeep Grand Cherokee and this issue of anti-lock brakes
> functionality came up with regards to the use of Part-Time 4x4 in snowy
> weather.
>
> We know how Part-Time mode operates on the four wheels. Given that, how
> does this affect a vehicle with anti-lock brakes, since ABS monitors the
> rotation of each wheel? If all four wheels are moving at the same rate,
> don't you lose the ability of the ABS to independently monitor each
> wheel speed and brake optimally/properly on a slippery surface that may
> NOT affect all four wheels?
>
> Jim
>

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

Re: ABS vs Part-Time 4x4 ?
 

Darned few Grand Cherokees have a part-time 4x4 system, are you sure
your Grand Cherokee has a Selectrac system that includes the part-time
4x4 mode? And a part-time 4x4 system does not lock the wheels together
so they are in "lock-step" with each other, the part-time 4x4 system
only locks the front and rear axles together...so tires are still free
to lock up on one side.

Jerry

Jim Y. wrote:
> I've got a Jeep Grand Cherokee and this issue of anti-lock brakes
> functionality came up with regards to the use of Part-Time 4x4 in snowy
> weather.
>
> We know how Part-Time mode operates on the four wheels. Given that, how
> does this affect a vehicle with anti-lock brakes, since ABS monitors the
> rotation of each wheel? If all four wheels are moving at the same rate,
> don't you lose the ability of the ABS to independently monitor each
> wheel speed and brake optimally/properly on a slippery surface that may
> NOT affect all four wheels?
>
> Jim
>

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

Re: ABS vs Part-Time 4x4 ?
 

Darned few Grand Cherokees have a part-time 4x4 system, are you sure
your Grand Cherokee has a Selectrac system that includes the part-time
4x4 mode? And a part-time 4x4 system does not lock the wheels together
so they are in "lock-step" with each other, the part-time 4x4 system
only locks the front and rear axles together...so tires are still free
to lock up on one side.

Jerry

Jim Y. wrote:
> I've got a Jeep Grand Cherokee and this issue of anti-lock brakes
> functionality came up with regards to the use of Part-Time 4x4 in snowy
> weather.
>
> We know how Part-Time mode operates on the four wheels. Given that, how
> does this affect a vehicle with anti-lock brakes, since ABS monitors the
> rotation of each wheel? If all four wheels are moving at the same rate,
> don't you lose the ability of the ABS to independently monitor each
> wheel speed and brake optimally/properly on a slippery surface that may
> NOT affect all four wheels?
>
> Jim
>

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

Re: ABS vs Part-Time 4x4 ?
 

My 96 GC Laredo I6 do have selectrac with part-time

"Jerry Bransford" <jerrypb@cox.net> a écrit dans le message de news:
ZA2Dd.11245$232.6893@fed1read05...
> Darned few Grand Cherokees have a part-time 4x4 system, are you sure your
> Grand Cherokee has a Selectrac system that includes the part-time 4x4
> mode? And a part-time 4x4 system does not lock the wheels together so
> they are in "lock-step" with each other, the part-time 4x4 system only
> locks the front and rear axles together...so tires are still free to lock
> up on one side.
>
> Jerry
>
> Jim Y. wrote:
>> I've got a Jeep Grand Cherokee and this issue of anti-lock brakes
>> functionality came up with regards to the use of Part-Time 4x4 in snowy
>> weather.
>>
>> We know how Part-Time mode operates on the four wheels. Given that, how
>> does this affect a vehicle with anti-lock brakes, since ABS monitors the
>> rotation of each wheel? If all four wheels are moving at the same rate,
>> don't you lose the ability of the ABS to independently monitor each wheel
>> speed and brake optimally/properly on a slippery surface that may NOT
>> affect all four wheels?
>>
>> Jim
>>
>
> --
> Jerry Bransford
> PP-ASEL N6TAY
> See the Geezer Jeep at
> http://members.cox.net/jerrypb/

Re: ABS vs Part-Time 4x4 ?
 

My 96 GC Laredo I6 do have selectrac with part-time

"Jerry Bransford" <jerrypb@cox.net> a écrit dans le message de news:
ZA2Dd.11245$232.6893@fed1read05...
> Darned few Grand Cherokees have a part-time 4x4 system, are you sure your
> Grand Cherokee has a Selectrac system that includes the part-time 4x4
> mode? And a part-time 4x4 system does not lock the wheels together so
> they are in "lock-step" with each other, the part-time 4x4 system only
> locks the front and rear axles together...so tires are still free to lock
> up on one side.
>
> Jerry
>
> Jim Y. wrote:
>> I've got a Jeep Grand Cherokee and this issue of anti-lock brakes
>> functionality came up with regards to the use of Part-Time 4x4 in snowy
>> weather.
>>
>> We know how Part-Time mode operates on the four wheels. Given that, how
>> does this affect a vehicle with anti-lock brakes, since ABS monitors the
>> rotation of each wheel? If all four wheels are moving at the same rate,
>> don't you lose the ability of the ABS to independently monitor each wheel
>> speed and brake optimally/properly on a slippery surface that may NOT
>> affect all four wheels?
>>
>> Jim
>>
>
> --
> Jerry Bransford
> PP-ASEL N6TAY
> See the Geezer Jeep at
> http://members.cox.net/jerrypb/

Re: ABS vs Part-Time 4x4 ?
 

My 96 GC Laredo I6 do have selectrac with part-time

"Jerry Bransford" <jerrypb@cox.net> a écrit dans le message de news:
ZA2Dd.11245$232.6893@fed1read05...
> Darned few Grand Cherokees have a part-time 4x4 system, are you sure your
> Grand Cherokee has a Selectrac system that includes the part-time 4x4
> mode? And a part-time 4x4 system does not lock the wheels together so
> they are in "lock-step" with each other, the part-time 4x4 system only
> locks the front and rear axles together...so tires are still free to lock
> up on one side.
>
> Jerry
>
> Jim Y. wrote:
>> I've got a Jeep Grand Cherokee and this issue of anti-lock brakes
>> functionality came up with regards to the use of Part-Time 4x4 in snowy
>> weather.
>>
>> We know how Part-Time mode operates on the four wheels. Given that, how
>> does this affect a vehicle with anti-lock brakes, since ABS monitors the
>> rotation of each wheel? If all four wheels are moving at the same rate,
>> don't you lose the ability of the ABS to independently monitor each wheel
>> speed and brake optimally/properly on a slippery surface that may NOT
>> affect all four wheels?
>>
>> Jim
>>
>
> --
> Jerry Bransford
> PP-ASEL N6TAY
> See the Geezer Jeep at
> http://members.cox.net/jerrypb/