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From: Huber55 on 11 Mar 2007 13:53
On Mar 10, 3:48 pm, "Ron Hinds" <b...(a)microsoft.com> wrote:
> "truckdummy23" <n...(a)000.com> wrote in message
>
> news:980910_93a07ee48a667ab1fe4513048b76b93b(a)0000.com...
>
> > It's a 1997 Ford, Expidition auto transmission...I was told to come to
> > a complete stop and put truck in n or park to switch..not sure if that
> > is necessary..;thanks
>
> It's only necessary when shifting into 4-low range. The Ford Expedition,
> just like virtually all other modern 4-wheel drives, can be shifted to/from
> 2-high and 4-high at any speed.

i almost dont want to post something on this thread cause i might get
stabbed for it! but just wanted to put my 2 cents in about this. I
have an '88 Bronco II with push button 4x4 and i everytime ive engaged
it i always try to think ahead about whether or not there will be snow
on the ground or not if theres a good possibility then i simply just
drive in 4 wheel, there is only a handfull of times in which i
switched into 4 high on the highway and in those cases i just like to
slow down to 30 mph to do so (highways around here are not busy at all
so this is possible without posing a hazard) the only reason i slow
down is that it seems to me like it would simply just be hard on the
system, i might be wrong but thats just the way it seems to me, i do
feel comfy switching it OUT of 4 high at any speed tho.

From: Ron Hinds on 11 Mar 2007 22:34
<Huber55(a)gmail.com> wrote in message
news:1173635615.472503.220020(a)h3g2000cwc.googlegroups.com...
> On Mar 10, 3:48 pm, "Ron Hinds" <b...(a)microsoft.com> wrote:
>> "truckdummy23" <n...(a)000.com> wrote in message
>>
>> news:980910_93a07ee48a667ab1fe4513048b76b93b(a)0000.com...
>>
>> > It's a 1997 Ford, Expidition auto transmission...I was told to come to
>> > a complete stop and put truck in n or park to switch..not sure if that
>> > is necessary..;thanks
>>
>> It's only necessary when shifting into 4-low range. The Ford Expedition,
>> just like virtually all other modern 4-wheel drives, can be shifted
>> to/from
>> 2-high and 4-high at any speed.
>
> i almost dont want to post something on this thread cause i might get
> stabbed for it! but just wanted to put my 2 cents in about this. I
> have an '88 Bronco II with push button 4x4 and i everytime ive engaged
> it i always try to think ahead about whether or not there will be snow
> on the ground or not if theres a good possibility then i simply just
> drive in 4 wheel, there is only a handfull of times in which i
> switched into 4 high on the highway and in those cases i just like to
> slow down to 30 mph to do so (highways around here are not busy at all
> so this is possible without posing a hazard) the only reason i slow
> down is that it seems to me like it would simply just be hard on the
> system, i might be wrong but thats just the way it seems to me, i do
> feel comfy switching it OUT of 4 high at any speed tho.

My experience is based on a friend who had a '90 Ranger 4x4 and another
friend who had a '94 Explorer 4x4. Both were push button shift-on-the-fly
transfer cases, at least to/from 2-High and 4-High. There were a few
drawbacks to the system these two vehicles used. 1) The light to indicate
4WD was engaged came on when the button was pressed, not when the front
wheel automatic locking hubs actually engaged; 2) The reason why number one
was a problem is that the only way the front auto-locking hubs ever got
lubricated was when the 4WD was engaged. If you didn't use 4WD for long
periods of time, the hubs wouldn't get lubricated and when you needed 4WD,
they would freeze and not engage the locks; 3) Assuming they did actually
lock, in order to unlock the front hubs you had to stop the vehicle, put it
in reverse and back up a certain distance (25 feet, IIRC). So while you
could shift the transfer case back from 4-high to 2-high on-the-fly, the
front hubs would remain locked until you followed that procedure. I don't
know if the '97 Expedition had those same drawbacks, but I'm sure they still
would have had the shift-on-the-fly capability (hopefully improved!).


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