GC 4wd on highway

My son borrowed our Grand Cherokee for a trip to Michigan.
He had it in full time 4wd for the snowy/icy local areas.
But - he forgot to dis-engage when he hit the highway.
SO... what ill elffects should I look for with the jeep running
in 4wd full tine on the highway at 50-70mph ??

tnx -

--
/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/
No Good Deed -
Goes Unpunished

ps56k wrote:
> My son borrowed our Grand Cherokee for a trip to Michigan.
> He had it in full time 4wd for the snowy/icy local areas.
> But - he forgot to dis-engage when he hit the highway.
> SO... what ill elffects should I look for with the jeep running
> in 4wd full tine on the highway at 50-70mph ??

Nothing except for burning a bit more fuel.

Full time is not what you are thinking it is.
I have the Quadratrack which is a full-time unit;
meaning it operate in full-time mode on all surface.

part-time is for off-road use only.

Some reading: http://www.jeep.com/en/4x4/faqs/


--
-- DougW -- 93 ZJ 4.0 http://revbeergoggles.com
HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors
Banks Header - and BEER, in the fridge!

On Thu, 30 Dec 2010 11:59:25 -0600, DougW wrote:

> ps56k wrote:
>> My son borrowed our Grand Cherokee for a trip to Michigan. He had it in
>> full time 4wd for the snowy/icy local areas. But - he forgot to
>> dis-engage when he hit the highway. SO... what ill elffects should I
>> look for with the jeep running in 4wd full tine on the highway at
>> 50-70mph ??
>
> Nothing except for burning a bit more fuel.
>
> Full time is not what you are thinking it is. I have the Quadratrack
> which is a full-time unit; meaning it operate in full-time mode on all
> surface.
>
> part-time is for off-road use only.
>
> Some reading: http://www.jeep.com/en/4x4/faqs/

The terms "full time" and "part time" were always counter-intuitive to me
as well.

"Lee Ayrton" > wrote in message
...
> On Thu, 30 Dec 2010 11:59:25 -0600, DougW wrote:
>
>> ps56k wrote:
>>> My son borrowed our Grand Cherokee for a trip to Michigan. He had it in
>>> full time 4wd for the snowy/icy local areas. But - he forgot to
>>> dis-engage when he hit the highway. SO... what ill elffects should I
>>> look for with the jeep running in 4wd full tine on the highway at
>>> 50-70mph ??
>>
>> Nothing except for burning a bit more fuel.
>>
>> Full time is not what you are thinking it is. I have the Quadratrack
>> which is a full-time unit; meaning it operate in full-time mode on all
>> surface.
>>
>> part-time is for off-road use only.
>>
>> Some reading: http://www.jeep.com/en/4x4/faqs/
>
> The terms "full time" and "part time" were always counter-intuitive to me
> as well.
>
>


Exactly what I told my wife when she was recently looking for a GC. The one
she found had the Selecttrac with the 2wd option, but she ended up getting
another YJ with about half the miles on it than the one she's been driving.

"No, dear, I don't want the GC with the power everything, compass,
thermometer and cruise. I'd rather have this '95 soft top Wrangler 4
cyl/5sp. You can drive my '94 with the 6 cyl."

No wonder I've been married to her for 33 years.

--
Old Crow
'82 FLTC(P) 92"
'87 FLTC
'61 F-100 302/C-6
BS#133, SENS, TOMKAT, SLOB#13, MAMBM

On Dec 30, 10:40*am, "ps56k" > wrote:
> My son borrowed our Grand Cherokee for a trip to Michigan.
> He had it in full time 4wd for the snowy/icy local areas.
> But - he forgot to dis-engage when he hit the highway.
> SO... what ill elffects should I look for with the jeep running
> in 4wd full tine on the highway at 50-70mph ??
>
> tnx -
>
> --
> / _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/
> No Good Deed -
> * * * * *Goes Unpunished

Not sure if your question got answered...if your GC has selectrac,
driving it in full time mode wet or dry should not harm it. Larry

In article >,
says...
>
> My son borrowed our Grand Cherokee for a trip to Michigan.
> He had it in full time 4wd for the snowy/icy local areas.
> But - he forgot to dis-engage when he hit the highway.
> SO... what ill elffects should I look for with the jeep running
> in 4wd full tine on the highway at 50-70mph ??

What makes you think there will be _any_ ill effects? Full time 4WD is
exactly that, full time. My '97 doesn't _have_ a two wheel drive mode.

In article >,
ess says...
>
> ps56k wrote:
> > My son borrowed our Grand Cherokee for a trip to Michigan.
> > He had it in full time 4wd for the snowy/icy local areas.
> > But - he forgot to dis-engage when he hit the highway.
> > SO... what ill elffects should I look for with the jeep running
> > in 4wd full tine on the highway at 50-70mph ??
>
> Nothing except for burning a bit more fuel.

Not necessarily even that. Audi did some research a while back and
found out that running in 4wd does something interesting to the tire
dynamics that, on the Quattro they were experimenting with anyway,
reduced the rolling friction a little bit, just enough to offset the
increased transmission losses from running in 4wd so it actually got
very slightly _better_ mileage in 4wd.

Dunno if GCs work the same way.

> Full time is not what you are thinking it is.
> I have the Quadratrack which is a full-time unit;
> meaning it operate in full-time mode on all surface.
>
> part-time is for off-road use only.
>
> Some reading: http://www.jeep.com/en/4x4/faqs/

tnx all -
with various things breaking over the years,
wasn't looking for something major.

Off to downtown Chicago - it's 50 outside -
and it was just down in the teens with 4" of snow !

ps56k wrote:
> tnx all -
> with various things breaking over the years,
> wasn't looking for something major.
>
> Off to downtown Chicago - it's 50 outside -
> and it was just down in the teens with 4" of snow !

pass. Enjoy and take care.

I was in Schaumberg a few weekends back when that big
snow storm came through. Turned the streets into a
skating rink and shut down O'Hare.

Planned on going downtown but the snow turned to
cold blowing rain and it's a bit of a hump from the
Metra down to the main drag. So I spent a few hours
kicking around Woodfield and buying stuff.

--
DougW