My '95 Chevy K2500 is the first four wheel drive vehicle I have ever
owned. It's the kind you control the transfer case by the lever on the
floor, instead of the button on the dash.
I would like some input on the basic rules of operation for the 4WD
1.) For example, I know that driving it in 4WD on dry pavement is hard
on them, which is understadable. But what about if you're going on a
trip which involves roads which are, say, 90% dry -- but have scattered
patches of snow or ice the entire length of the trip? What are the
effects of driving it that much on dry pavement?
2.) Also, someone told me that, when driving in 4Hi, you shouldn't
drive at higher speeds, like interstate speed. I hadn't heard that
before. Is that true?
3.) I know turning sharp in 4WD is hard on them, but when just making a
normal turn -- like taking off from a stop around a corner on a snow
packed road -- should you try to avoid giving it much gas (and kind of
baby it through the turn), or is it ok to accelerate pretty much
The 4WD works good in it now and I do not want to hasten the wear on
it -- but I also want to get the benefit of having it with all the snow
here, and not worry that I am not using it correctly. TIA
If it is 90% dry, you probably won't want or need the 4WD. If you are
cruising at 70 mph and hit an ice patch, it won't matter how many wheels are
If you need 4WD, you probably won't hit those speeds.
When on snow packed roads you should be gentle anyway.
Every year I see 4WD vehicles off the side of the road because the drivers
think it works miracles on slippery roads at high speeds. 4WD is great for
deep snow and off road use, but it does not make you stick to ice very well.
Nothing will stop them. Like brakes, for instance. They do have more
traction is snow, going up a hill and the like, but on slick ice, they will
slide like any other car and stop (or not) like any other car. Too many
drivers think they will stick to the road better, but tire traction is no
better on black ice
I guess I was thinking principally about the use on dry pavement, wear
etc.. I never heard that the modern 4WD versions were much worse than 2WD.
I used to own a Cobra Mustang with the limited slip differential. Now THAT
was a hazard on slick pavement and curves. The limited slip seemed to make
worse than normal.
Well to be truthful most of the AWD vehicles built today started life as
front wheel drives. They tack a tiny differential in the back and call
them AWD. However the rear axle could not handle the full load of the
vehicle under constant use. They use either a mechanical open gear set
or a vicious coupling to power the rear axle. They do see some increase
in tire wear and you need to change all 4 tires at the same time or risk
damage to the system.
Compare the current AWD systems and the old systems used in the Scouts
and Blazers and there is a HUGE difference. In those they have very
little slip between each tire. They used a hard drive system usually
with limited slip differentials in both ends. Really increased tire wear
as a result.
On Mon, 28 Dec 2009 20:40:34 -0800, burboun firstname.lastname@example.org (burboun
Just as bad as driving on all dry pavement. Not more than a few feet
is acceptable, except in an absolutely straight line, where you can
maybe go a hundred feet. If there are strips of bad traction, slow
down... That's NOT what 4WD is for.
Yes, generally you'd want to keep it below about 35 or so. Not because
it is hard on the vehicle, but that the road conditrions are so bad
that you can't safely drive any faster.
Again, slippery not dry pavement you are OK. If the pavement is dry,
don't use 4WD.
Normally is fine, but don't spin the tires, you will have little
control in that case.
My friend from Wisconson says people with 4WD usually are the ones that
wind up in the ditch. From being over confident.
Based on my experience with M35A2 trucks, you keep the vehicle in 2WD
until your loosing traction.
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