Difference between 4High and 4High Lock

[lexunet]

New H3 owner. I know this is probably a dumb question. If the H3 is full time all wheel drive, what is the difference between 4 High and 4 High Lock? I have a base model without the locking diff.

I also used 4 Low Lock the other day. The trans was pretty darn loud. Is that normal?

[HummBebe]

Anytime you want to do more than 25MPH, 4 hi lock. Under 25 MPH, 4 lo lock.

4 lo lock in 1st or 2nd gear. Very noisy.....normal.

[lexunet]

Thank you for the reply. What about the difference between regular 4 High and 4 High Lock? Again I have a base model w/o the locking diff.

[Field Scout]

4 hi power distributed approx 40/60 f/r open diffs 4 hi lock 50/50 center diff locked equal power all four wheels

[ChevyHighPerformance]

Originally Posted by lexunet

Thank you for the reply. What about the difference between regular 4 High and 4 High Lock? Again I have a base model w/o the locking diff.

4 High Open - provides a constant 40%/60% front/rear torque split

4 High Lock - allows a 50%/50% split front/rear for more slippery surfaces

[lexunet]

Thanks. Good to know!

[Sewie]

Welcome lexunet!

Whereabouts in CA are you?

[lexunet]

Thanks for the welcome. I live if Fresno.

[Sewie]

Originally Posted by lexunet

Thanks for the welcome. I live if Fresno.

Cool, you'll have to come out wheeling with us sometime. There's a bunch of us in NorCal (and a couple SoCal folks we let tag along ). I've been wanting to hit some of the trails around the Shaver Lake area.

[HummBebe]

welcome!

4hi lock is for snow/mud

4 lo lock is for rocks/steep descent etc....

[NEOCON1]

Originally Posted by Field Scout

4 hi power distributed approx 40/60 f/r open diffs 4 hi lock 50/50 center diff locked equal power all four wheels

X2

i was gonna say that

[f5fstop]

Originally Posted by HummBebe

welcome!

4hi lock is for snow/mud

4 lo lock is for rocks/steep descent etc....

4-Lo Lock is also used for pulling Jeeps out of deep rivers, quicksand, etc.

[Sugardaddy]

Originally Posted by f5fstop

4-Lo Lock is also used for pulling Jeeps out of deep rivers, quicksand, etc.

LOL

[Sewie]

Originally Posted by f5fstop

4-Lo Lock is also used for pulling Jeeps out of deep rivers, quicksand, etc.

LMAO!! That should be in the manual.

[lexunet]

Thanks again for all the welcome. I would love to try out some trails near Shaver Lake sometime!

I don't want to be the kind of guy that never uses his Hummer for what it was intended to do... go anywhere!

[usetosellhummer]

good you want to break that truck in right with a getting to know dirt party

[Michael1]

Originally Posted by ChevyHighPerformance

4 High Lock - allows a 50%/50% split front/rear for more slippery surfaces

Technically, there is no torque split when locked, because it is no longer a differential. For example, if the front encounters a slippery surface, torque will be transmitted to the rear up to 100%, and vice versa.

Michael.

[Big Z]

Originally Posted by lexunet

New H3 owner. I know this is probably a dumb question. If the H3 is full time all wheel drive, what is the difference between 4 High and 4 High Lock? I have a base model without the locking diff.

I also used 4 Low Lock the other day. The trans was pretty darn loud. Is that normal?

Two things comes to Mind!

1. WTF were you thinking With? ----Pretty Damn Loud!----- in Low LOCK!

2. The **** eating Grin Must of Affected the Thought process!....

READ YOUR MANUAL!!!

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Dirt Good. Detergent Bad!!