HummerTech, you're absolutely right, I assume I was addressing myself to an offroad skilled audience http://www.elcova.com/infopop/emoticons/icon_smile.gif only a novice beginner would engage diff-lock and go at high speeds and ultimately break the diff altogether.
In certain situations, SPECIALLY in soft Desert dunes you have to travel between 5 and 12 MPH, however, TORQUE is not what is needed to climb a dune, it's Horsepower. AND you also need diflock at the same time when tackling endless dunes one after the other (axle articulation). I think in the US you guys experience the same situation when in mud terrain where an extra speed to help you get accross is needed.
In soft sand we always use 4HI we only switch to 4LO when we are in trouble and need that extra push.
Another thing I didnt like in the H3, the Stabilitrac was engaging by itself without "asking me" (heheh) I didnt like that because it was cutting power to certain wheels where I needed the power the most. Putting the vehicle in control instead of me. Offroaders HATE that. Onroad put whatever system you want, we'll play along, but Offroad, we have to be in charge.
coming back to your point, you're right and I'm right. Engaging diff-lock in 4HI is only for experienced people who know what they're doing and know WHEN to use it. A skilled evaluation of the terrain is necessary here.
DuneH3
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Hummertech:
I don't reccomend bypassing that. GM did that for a reason. When that lock is on, your rear axle is locked solid. When that thing is locked solid, something has to give when the rear tires are not spinning at exactly the same speed, and the faster you go the more likely is that it will break something in the rear axle. And if you bypass it and break something, you can forget about warranty covering it. I haven't experienced a time yet in which you need it above 20mph. </div></BLOCKQUOTE>