AWD
Full time 4WD
RWD with Front assist?

What is it?

AWD
Full time 4WD
RWD with Front assist?

What is it?

yes.



ok... as far as I understand it... it is rear 70/30 front.


unaslob

Corsa Sport exhaust(offroad 'tip'), Gobi rack w/ lights & w/roof mounted tire w/ ladder, Warn Winch with rear power, Dual Wolo Airhorns w/ lanyard valve, Hadley Aircompressor 130PSI, 14" airtank, front and rear quick disconnects for air, Cobra 75 WX CB, Dual 4' Firestik fiberglass whips, front tinted windows, 7" Homer Simpson decal (teehee)!

Thanks Phil...
I always wondered what the differences were.
Never knew the real differences.
Now I can be the life of the party!

Ric-H2

Ya.. Thanks Phil. Great Explanation!

I was wondering cuz no where does it state what it is on any of the hummer marketing material.

<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by PhilD:
It is full time 4WD. It is not AWD. AWD is not really designed for off road use and doesn't do very well off road....

Full time 4WD is the correct answer, although some will no doubt argue...<HR></BLOCKQUOTE>
I took this as an invitation. It IS full time 4WD but it is also AWD. My limited understanding is that AWD can simply be a full time 4WD system that continually modulates the power to the wheels based on torque needs at each wheel. This is what 4HI Open does in the H2. While there is normally a 40/60 power split front/back, the H2 uses a sophisticated system to detect slippage at each wheel and manages the slippage by transferring power to the appropriate wheel.

When the 4HI Locked is chosen, the H2 is now in full time 4WD with a 50/50 split front/rear with the traction control still part of the process.

When someone asks, it's easier to say full-time 4WD because AWD makes people think of things like Volvo's and Suburu's but from a pure definition standpoint I think both answers are correct because all full-time 4WD vehicles have to be AWD by definition but not all AWD systems are full-time 4WD. The reason is that some AWD systems send all the power to the rear until in detects slippage, therefore it would be a 2WD until slippage occurs.

The H2 would be considered both AWD and full-time 4WD. I think I typed what I was thinking, but then again I might have confused myself on this one.

<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by PhilD:
I knew someone would disagree
...it is generally accepted tpo refer to anything by the highest level it achives, not the lowest.

You can call your H2 an AWD truck and I'll stick to calling mine a full time 4WD, then we'll all be happy <HR></BLOCKQUOTE>
TOUCHE'

<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by AlamoJim:
So what your saying is that the tcase will supply the power to the wheels that need it in tough conditions - like speed bumps and climbing between parking levels?...
oh, and large slippery boulders to boot!
(I couldn't stop myself...I will delete this post when I feel sufficient guilt)
<HR></BLOCKQUOTE>
Yeah, and it also supplies power to the wheel that needs it when it's climbing over puny Jeeps.

<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by jnsfox:
Damn Trolls!!! <HR></BLOCKQUOTE>
that would be sufficient guilt...
like I said...couldn't stop myself, my mind said no but my fingers typed anyway, lol

The difference between Genius and Stupidity?
Genius has limits...

<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by jnsfox:
I actually have a question that may sound stupid, but it's been bothering me. All other GMC trucks run normally in 2HI, why did the H2 not at least come with selectable 2HI and wouldn't this have helped gas mileage....please be nice, I know this is probably a dumb question

Seth<HR></BLOCKQUOTE>
Seth, the gas mileage gain would probably be very small as you still have the weight issue and the UN-aerodynamic aspect of the shape of the H2. The only real issue that would effect mileage would be increased friction due to having to provide power through more points.

For instance, I also have a Yukon XL Denali that is full time 4WD, weighs nearly the same as the H2 but gets about 17mpg. It's due to slicker aerodynamics and the fact that the Denali is geared with 3.73 differentials.

<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by paragon:
It's due to slicker aerodynamics and the fact that the Denali is geared with 3.73 differentials.<HR></BLOCKQUOTE>
Gearing plays a HUGE part in the mileage and the application of power...
many off roaders will regear a vehicle to regain the power lost with bigger tires/wheels -
but running 4:10 or lower (4:56,etc...) will really kill your highway mileage if you try to
run 65mph - you end up running 2k-3k rpm to try and maintain your speed.
running a 3:73 will give you much better highway mileage but you will suffer in power
situations since your multiplying less torque to the axles. My wifes Expedition is great on
the highway running 3:73s but can't outrun a Yugo from the stoplight...
yes being shaped like a box with a big upright windshied doesn't help
(I should know - just a smaller box), but the gearing and tire/wheel size is such a
big factor - more than most people realize until after they get bigger tires/wheels.
I am planning more lift and bigger tires/wheels in the spring and I know that
I need to add in another grand to cover installing new gears (I am not into the 'look'
I expect the vehicle to perform offroad...)

The difference between Genius and Stupidity?
Genius has limits...

Now look what you've done. You've agitated Phil. Just back away, sloooowly. And don't make any more eye contact!

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SUT on order 12/02. 12 months down, 6 to go!
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Ok I think I got this AWD and 4wd thing done.. I have just one question.. If I'm drivin backwards. is it now 60/40 instead of 40/60?

Mike