Sorry, Dennis

I just tried it, and debunked this. I engaged the high lock, second button from the left, and drove up to 60 mph without disengagment. No flashing, it simply stayed lite in the high lock selection. On my test, I was driving slower when I engaged it, and then sped up to 60 mph, and held it there for a few moments, then slowed back down to a near stop, and disnegaged the system. And I'm not really surprised. I would be suprised if a system like that was created, .. but even more I would be shocked if said system wasn't reported by the likes of Fourwheeler mag, among the other off road mags that tested the H3. Surely they would have beaten that ill thought idea to death. Since it was never meantioned by them, and is something I've never heard of as well, I didn't expect to find that (the unlocking) to be accurate. And, in my case, it wasn't.

Perhaps being at a lower speed when trying to engage the system is what made it work.. I really didn't take a long time to try every option. But, when it was brought up, it was implied that the system couldn't get "left" in high lock because it would disengage at or above 45 mph.. which is not correct. Perhaps it won't engage at or above 45 mph, and that's an OM typo .. I don't know. But the system will not unlock due to speed, as I suspected.

If yours is unlocking at or above 45 mph, it may need to be checked out. If mines broke, then I'll leave it just the way it is.

 

By your own admission, you only debunked half of my Understanding...I was half right with the thing not engaging above 45 MPH..But as the taste of half my foot still lingers in my mouth, I can at least be big and Honest about the fact that I never tested it after it was engaged, and seen if it would kick out above 45 MPH, I just assumed the same held true for exceeding 45 while engaged..But tonight on the way home, I tested all the possible senarios and found that it WILL NOT engage above 45 MPH, BUT it WILL STAY engaged above 45 MPH and beyond, if you engaged it below 45 MPH to begin with..My Bad

However, given that NEW understanding I now have, thanks to you FireMAN..who is da-MAN when it comes to 4 wheeling[sm=hail.gif] I can reasonably believe that the OM is inferring; don't drive faster than 75 MPH if you don't want to damage the Drivetrain if the High lock is engaged

PS; here's another little fact I proved tonight while testing the senarios..Once you exceed 45 MPH, while High lock is engaged, you can not unengage it, until you get back below 45 MPH...

And yes, as you say, I would probably never use it..But I can't imagine needing it if I was able to blaze through the flora and fauna at 45 -50 MPH..that one don't make sense.



Cheers[sm=icon_cheers.gif]

 

Ok, first off, my replies were not meant to "debunk" you, but rather and false info that you might have read or received or .. even perceived. They were not meant to argue against you, but rather clarify to anyone interested that it will not disengage at speed. I simply knew that such a system has no practicle purpose, and would not be excepted in any market.

Thanks for taking the time to try out all the senarios, I wanted to, but this afternoon was meet the teacher for my 3rd grader, so I was short on time. Afterwards, I thought about it, and figured that the OM had to be wrong about the 75 mph, and that what you had experienced was probably in fact what they said, but it shoul dhave said UNDER 45 MPH, and not 75. I even took a double take at the 75 when I saw it, thinking it was quite a generous number.

Now, about not needing 4wd while doing 45 - 50 through the flora and fauna ..

You're making an assumtion from one persective.. you've assumed that you are moving while doing the 45 - 50. But picture, if you will, creeping along down a wet, soggy, muddy trail.. suddenly things start getting just a bit deeper than they had been .. the H3 starts to get a bit sluggish in the goo .. and you feed a little more throttle to keep up your momentum. You're only moving along at about 20-25 mph, but the extra wheel spin tells the speedo that you're doing 45, and BAM the 4wd kicks out and leaves you in this mess ... who knows.. perhaps you're not even moving at all. Maybe you're almost at a standstill .. nearly stuck when it disnegages becuase the sensors say that you're going 45 mph.

Not a pretty picture.. and exactly the reason no seansable manufacturer would ever design something like that. So, yes, if you're moving along at 50 you're probably not in much need of 4wd.. unless of course you're not really DOING 50. The computer reads a circut board, it doesn't look out the windows. It really doesn't take much trottle, when spinning in mud, to get the speedo up to the 45 mph range. For anyone who hasn't tried it, it gets there a lot quicker than you think.

But, one good thing did come from all this.. we now know for a fact, that it won't disnegage, and that's what matters.

 

Aaah!..excellent point and very narrow minded on my part not to see that....Thanks a gain for the indepth overview of these things..This is why the forums on these subjects enlighten and dare I use the word, DEBUNK the falsehoods or misconceptions novices like myself have about 4 wheeling..

Thanks bro..you are a great asset here.

 

Hi All! New owner here - 2007 H3 Boulder Gray - Lux Package.

Newbie 4X4 Question:
While normal driving (4WD - first button on the left lit) and taking a tight turn, the thing switched into 4WD High Lock all by itself!

Is this normal or do I need to see the Hummer man?

Thanks.

 

I noticed when my H3 is in hi-lock and I try to turn (or circle, tight turn) the car just stalls and becomes very heavy.

As I understood from the explanation that this is perfectly normal,

am I right guys?

 

Not sure if it should stall but it will "lunge/lurch/ feel knoby".

Basically to try to explain it you have two wheels at different distnaces on a locked axcel trying to make an even radius. The inner wheel needs to turn less then the outer wheel to make the turn. So you get the "notchy feeling".

 

Only way I can see it stalling is if you have a manual trans and are in too high a gear for the extra load put on the motor. Do you have a stick or auto?

 

To importkiller

i have an auto, and it's in normal drive "D"..

it's not like stalling STALLING,, but more like not wanting to move, and i end up revving the engine (pushing the gas) more thant it feels normal to get the car moving.

i don't drive in hi lock at all, but that day i was trying it out.

 

then yes, that is normal. Especially on dry hard ground, the engine will have to work a lot harder and you will feel a lurch in the front end as it pulls you through the turn.