Not all 'full time' or AWD drives are even close to the same
technologies!

'Limited slips' come into the transfer cases and diffs, dual trannies or
drives, all kinds of things can be used.

99% of the vehicle performance is the driver....

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Patrick wrote:
>
> So a AWD Subaru would be better for every day driving in the snow ( city
> driving )
> but very limited off-road ? Is that correct ? i have heard good thing about
> Subaru AWD latest generation.
>
> "Mike Romain" <romainm@sympatico.ca> a écrit dans le message de news:
> 41E15DAF.6B45EE39@sympatico.ca...
> >I believe the big difference is with the full time on, any 'one' of 4
> > tires can be the main drive wheel, so when stopped and not using the
> > brakes to vary the load, only one tire can be merrily spinning away.
> >
> > If you put it into 'part time', the front and rear axles are locked so
> > when stopped on ice at least 'two' wheels are spinning merrily away.
> >
> > When this happens, you can hit the brake pedal and with some practice
> > get both rear wheels spinning and sometimes even all 4 will break loose.
> >
> > Torque goes to 'both' tires on one differential equally, so the one tire
> > spinning loose has very little torque on it so the other side sits
> > still. Hit the brakes or my owners manuals say you can use the
> > emergency brake and you apply braking torque to the spinning wheel.
> > This can get strong enough to match the traction of the stopped wheel so
> > that the wheel on the other side will break loose and spin too.
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
> >
> > Patrick wrote:
> >>
> >> Last night got a bit stuck in a big snow bank, Selectrac I6 4x4, i was on
> >> full time
> >>
> >> The rear right (passenger) wheels was spinning and it feel it was the
> >> only
> >> wheel really trying to get out, i know the 4x4 is working (Light on and
> >> feeling while doing u-turn ) but why i did not see the front wheel
> >> spinning
> >> while the gc was on Reverse , I was outside with the truck engage looking
> >> at
> >> the truck spinning. !!!!!
> >>
> >> I tried part time and no much luck. Got out of there with time and
> >> patience
> >> REVERSE,DRIVE,REV... Is AWD subaru vehicules working the same ?
> >>
> >> thanks
> >>
> >> Pat

 

Not all 'full time' or AWD drives are even close to the same
technologies!

'Limited slips' come into the transfer cases and diffs, dual trannies or
drives, all kinds of things can be used.

99% of the vehicle performance is the driver....

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Patrick wrote:
>
> So a AWD Subaru would be better for every day driving in the snow ( city
> driving )
> but very limited off-road ? Is that correct ? i have heard good thing about
> Subaru AWD latest generation.
>
> "Mike Romain" <romainm@sympatico.ca> a écrit dans le message de news:
> 41E15DAF.6B45EE39@sympatico.ca...
> >I believe the big difference is with the full time on, any 'one' of 4
> > tires can be the main drive wheel, so when stopped and not using the
> > brakes to vary the load, only one tire can be merrily spinning away.
> >
> > If you put it into 'part time', the front and rear axles are locked so
> > when stopped on ice at least 'two' wheels are spinning merrily away.
> >
> > When this happens, you can hit the brake pedal and with some practice
> > get both rear wheels spinning and sometimes even all 4 will break loose.
> >
> > Torque goes to 'both' tires on one differential equally, so the one tire
> > spinning loose has very little torque on it so the other side sits
> > still. Hit the brakes or my owners manuals say you can use the
> > emergency brake and you apply braking torque to the spinning wheel.
> > This can get strong enough to match the traction of the stopped wheel so
> > that the wheel on the other side will break loose and spin too.
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
> >
> > Patrick wrote:
> >>
> >> Last night got a bit stuck in a big snow bank, Selectrac I6 4x4, i was on
> >> full time
> >>
> >> The rear right (passenger) wheels was spinning and it feel it was the
> >> only
> >> wheel really trying to get out, i know the 4x4 is working (Light on and
> >> feeling while doing u-turn ) but why i did not see the front wheel
> >> spinning
> >> while the gc was on Reverse , I was outside with the truck engage looking
> >> at
> >> the truck spinning. !!!!!
> >>
> >> I tried part time and no much luck. Got out of there with time and
> >> patience
> >> REVERSE,DRIVE,REV... Is AWD subaru vehicules working the same ?
> >>
> >> thanks
> >>
> >> Pat

 

You can shift a Jeep into and out of 4x4 high at any legal speed. They
started 'shift on the fly' back with the CJ's....

For 4x4 low, it still shifts better when going 2-3 mph for the reason
given below.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

SteveBrady wrote:
>
> It probably says in your manual that you need to be rolling for it to
> engage. Remember that gear teeth have to engage and can do that easier when
> the gears are moving.
>
> My manual says I'm to be rolling a few kph.
>
> "Jim Y." <jjy0912@hotmail.com> wrote in message
> news:lDjEd.13195$by5.567@newssvr19.news.prodigy.co m...
> > Actually I had a similar experience with my Grand Cherokee Laredo
> > (Selectrac).
> >
> > We've had a big snowstorm last week, so main streets are just wet, but
> > side streets, alleys and parking lots can be snow covered.
> >
> > One thing I've noticed for me anyway, is both Part Time and Full Time 4x4
> > do not seem to "fully engage" unless I'm rolling.
> >
> > Why do I say that? On two occassions yesterday, the back wheels were
> > slipping (once in an alley and the other as I tried to break into traffic
> > from a snow covered parking lot driveway). I slipped, traffic was bearing
> > down, I went into reverse to pull the vehicle back. Shifted to Drive, then
> > put on Part Time 4x4 (light on) and tried again. Again, rear wheels
> > slipped. So I waited for the red light to halt incoming traffic. :-) As I
> > drove away I could feel it engage, in a few seconds.
> >
> > Later that night I cut through an alley, started to slip, and put on the
> > Part Time again. Initially the rear wheels continued to slip, then after
> > like 30 feet, I could "feel" the 4x4 in the steering wheel, and then it
> > gripped the snow.
> >
> > I have a friend who has a Wrangler. I've been in it when we were stuck.
> > Pull it into Part Time and it engages immediately.
> >
> > Someone please tell me on Grand Cherokees with Selectrac (Part Time and
> > Full Time), why does it seem like you have to be rolling for it to engage?
> > I had it for a few years and it's always been that way.
> >
> > Jim
> >
> > That begs the question: If I'm truly stuck and bogged down, will I be able
> > to
> > "Patrick" <pat.guarnaccia@sympatico.ca> wrote in message
> > news:i_adnX74-YIyXX3cRVn-3A@b2b2c.ca...
> >> Last night got a bit stuck in a big snow bank, Selectrac I6 4x4, i was on
> >> full time
> >>
> >> The rear right (passenger) wheels was spinning and it feel it was the
> >> only wheel really trying to get out, i know the 4x4 is working (Light on
> >> and feeling while doing u-turn ) but why i did not see the front wheel
> >> spinning while the gc was on Reverse , I was outside with the truck
> >> engage looking at the truck spinning. !!!!!
> >>
> >> I tried part time and no much luck. Got out of there with time and
> >> patience REVERSE,DRIVE,REV... Is AWD subaru vehicules working the same ?
> >>
> >> thanks
> >>
> >> Pat
> >>
> >>
> >

 

You can shift a Jeep into and out of 4x4 high at any legal speed. They
started 'shift on the fly' back with the CJ's....

For 4x4 low, it still shifts better when going 2-3 mph for the reason
given below.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

SteveBrady wrote:
>
> It probably says in your manual that you need to be rolling for it to
> engage. Remember that gear teeth have to engage and can do that easier when
> the gears are moving.
>
> My manual says I'm to be rolling a few kph.
>
> "Jim Y." <jjy0912@hotmail.com> wrote in message
> news:lDjEd.13195$by5.567@newssvr19.news.prodigy.co m...
> > Actually I had a similar experience with my Grand Cherokee Laredo
> > (Selectrac).
> >
> > We've had a big snowstorm last week, so main streets are just wet, but
> > side streets, alleys and parking lots can be snow covered.
> >
> > One thing I've noticed for me anyway, is both Part Time and Full Time 4x4
> > do not seem to "fully engage" unless I'm rolling.
> >
> > Why do I say that? On two occassions yesterday, the back wheels were
> > slipping (once in an alley and the other as I tried to break into traffic
> > from a snow covered parking lot driveway). I slipped, traffic was bearing
> > down, I went into reverse to pull the vehicle back. Shifted to Drive, then
> > put on Part Time 4x4 (light on) and tried again. Again, rear wheels
> > slipped. So I waited for the red light to halt incoming traffic. :-) As I
> > drove away I could feel it engage, in a few seconds.
> >
> > Later that night I cut through an alley, started to slip, and put on the
> > Part Time again. Initially the rear wheels continued to slip, then after
> > like 30 feet, I could "feel" the 4x4 in the steering wheel, and then it
> > gripped the snow.
> >
> > I have a friend who has a Wrangler. I've been in it when we were stuck.
> > Pull it into Part Time and it engages immediately.
> >
> > Someone please tell me on Grand Cherokees with Selectrac (Part Time and
> > Full Time), why does it seem like you have to be rolling for it to engage?
> > I had it for a few years and it's always been that way.
> >
> > Jim
> >
> > That begs the question: If I'm truly stuck and bogged down, will I be able
> > to
> > "Patrick" <pat.guarnaccia@sympatico.ca> wrote in message
> > news:i_adnX74-YIyXX3cRVn-3A@b2b2c.ca...
> >> Last night got a bit stuck in a big snow bank, Selectrac I6 4x4, i was on
> >> full time
> >>
> >> The rear right (passenger) wheels was spinning and it feel it was the
> >> only wheel really trying to get out, i know the 4x4 is working (Light on
> >> and feeling while doing u-turn ) but why i did not see the front wheel
> >> spinning while the gc was on Reverse , I was outside with the truck
> >> engage looking at the truck spinning. !!!!!
> >>
> >> I tried part time and no much luck. Got out of there with time and
> >> patience REVERSE,DRIVE,REV... Is AWD subaru vehicules working the same ?
> >>
> >> thanks
> >>
> >> Pat
> >>
> >>
> >

 

You can shift a Jeep into and out of 4x4 high at any legal speed. They
started 'shift on the fly' back with the CJ's....

For 4x4 low, it still shifts better when going 2-3 mph for the reason
given below.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

SteveBrady wrote:
>
> It probably says in your manual that you need to be rolling for it to
> engage. Remember that gear teeth have to engage and can do that easier when
> the gears are moving.
>
> My manual says I'm to be rolling a few kph.
>
> "Jim Y." <jjy0912@hotmail.com> wrote in message
> news:lDjEd.13195$by5.567@newssvr19.news.prodigy.co m...
> > Actually I had a similar experience with my Grand Cherokee Laredo
> > (Selectrac).
> >
> > We've had a big snowstorm last week, so main streets are just wet, but
> > side streets, alleys and parking lots can be snow covered.
> >
> > One thing I've noticed for me anyway, is both Part Time and Full Time 4x4
> > do not seem to "fully engage" unless I'm rolling.
> >
> > Why do I say that? On two occassions yesterday, the back wheels were
> > slipping (once in an alley and the other as I tried to break into traffic
> > from a snow covered parking lot driveway). I slipped, traffic was bearing
> > down, I went into reverse to pull the vehicle back. Shifted to Drive, then
> > put on Part Time 4x4 (light on) and tried again. Again, rear wheels
> > slipped. So I waited for the red light to halt incoming traffic. :-) As I
> > drove away I could feel it engage, in a few seconds.
> >
> > Later that night I cut through an alley, started to slip, and put on the
> > Part Time again. Initially the rear wheels continued to slip, then after
> > like 30 feet, I could "feel" the 4x4 in the steering wheel, and then it
> > gripped the snow.
> >
> > I have a friend who has a Wrangler. I've been in it when we were stuck.
> > Pull it into Part Time and it engages immediately.
> >
> > Someone please tell me on Grand Cherokees with Selectrac (Part Time and
> > Full Time), why does it seem like you have to be rolling for it to engage?
> > I had it for a few years and it's always been that way.
> >
> > Jim
> >
> > That begs the question: If I'm truly stuck and bogged down, will I be able
> > to
> > "Patrick" <pat.guarnaccia@sympatico.ca> wrote in message
> > news:i_adnX74-YIyXX3cRVn-3A@b2b2c.ca...
> >> Last night got a bit stuck in a big snow bank, Selectrac I6 4x4, i was on
> >> full time
> >>
> >> The rear right (passenger) wheels was spinning and it feel it was the
> >> only wheel really trying to get out, i know the 4x4 is working (Light on
> >> and feeling while doing u-turn ) but why i did not see the front wheel
> >> spinning while the gc was on Reverse , I was outside with the truck
> >> engage looking at the truck spinning. !!!!!
> >>
> >> I tried part time and no much luck. Got out of there with time and
> >> patience REVERSE,DRIVE,REV... Is AWD subaru vehicules working the same ?
> >>
> >> thanks
> >>
> >> Pat
> >>
> >>
> >

 

That's hysterical
Thanks for the laugh
TrailMarker

 

That's hysterical
Thanks for the laugh
TrailMarker

 

That's hysterical
Thanks for the laugh
TrailMarker

 

I have a 99 gc with quadratrac II and have noticed that the full time does
not perform well form a cold start.
I have assumed that the "fluids or hydrolic system" needs to warm up to
operating temp before the full time
will work well. After driving only a mile I see a marked improvement in
traction. At the same time if I shift
into part time I recieve solid traction even from a cold start. All of this
is when starting cold from my driveway
turning onto a snow covered 7% grade road. To test this I have tried
driving out of my driveway immediatly
after returning home in full time.

jimo


"Richard" <rwrede2@hotmail.com> wrote in message
news:yX4Ed.14270$v61.7391@fe03.lga...
> this is curious...'(quote the posted article)'...
>
> "Finally, a full-time 4x4 system like comes on most Grand Cherokees and
> some
> Cherokees and Liberties 'couples' the front and rear axles together, but
> they are not mechanically locked together like a part-time 4wd system
> does.
> The coupling can be done via either a differential (just like what is
> between the left and right tires) or a fluid (viscous) coupler. The
> benefit
> to a full-time 4wd system is that because the front and rear axles are not
> mechanically locked together, the front and rear tires/axles can rotate at
> different rpms from each other. This allows a vehicle with a full-time 4wd
> system to drive in 4wd "full time" on a paved road without problem since
> there is no 'wind-up' problem to harm the drivetrain."...
>
> I was driving in some fresh snow today, packed/loose mixed... and as
> usual,
> I used my "Full Time" 4WD, but I (unusually) was slipping a bit on a very
> steep hill and sharp corners and tried "Part Time" and it seemed to work
> better. So what gives? I thought "Full Time" was supposed to be better. (I
> would never use the "Part Time" on dry pavement)
>

 

I have a 99 gc with quadratrac II and have noticed that the full time does
not perform well form a cold start.
I have assumed that the "fluids or hydrolic system" needs to warm up to
operating temp before the full time
will work well. After driving only a mile I see a marked improvement in
traction. At the same time if I shift
into part time I recieve solid traction even from a cold start. All of this
is when starting cold from my driveway
turning onto a snow covered 7% grade road. To test this I have tried
driving out of my driveway immediatly
after returning home in full time.

jimo


"Richard" <rwrede2@hotmail.com> wrote in message
news:yX4Ed.14270$v61.7391@fe03.lga...
> this is curious...'(quote the posted article)'...
>
> "Finally, a full-time 4x4 system like comes on most Grand Cherokees and
> some
> Cherokees and Liberties 'couples' the front and rear axles together, but
> they are not mechanically locked together like a part-time 4wd system
> does.
> The coupling can be done via either a differential (just like what is
> between the left and right tires) or a fluid (viscous) coupler. The
> benefit
> to a full-time 4wd system is that because the front and rear axles are not
> mechanically locked together, the front and rear tires/axles can rotate at
> different rpms from each other. This allows a vehicle with a full-time 4wd
> system to drive in 4wd "full time" on a paved road without problem since
> there is no 'wind-up' problem to harm the drivetrain."...
>
> I was driving in some fresh snow today, packed/loose mixed... and as
> usual,
> I used my "Full Time" 4WD, but I (unusually) was slipping a bit on a very
> steep hill and sharp corners and tried "Part Time" and it seemed to work
> better. So what gives? I thought "Full Time" was supposed to be better. (I
> would never use the "Part Time" on dry pavement)
>