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11-16-2005, 10:39 PM
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Hummer Guru
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Join Date: Oct 2005
Location: Charlotte, NC
Posts: 2,767
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DO IT.
Before I put my lift on my H2, my gas mileage was roughly 11-12 mpg. That was driving mostly city, minor highway.
When I put the lift with the 38's on it, my mileage immediately went from the 11-12 mpg to 8.6-9.1 mpg.
My logic was to install 4.56's which would bring the truck as close as possible to the stock configuration.
Point is, though I only installed them this weekend, I am averaging 11.0-11.5 mpg with way more power.
Excluding the labor because I did it, I've got less than 700 bucks in it. At a 2-3mpg increase, it won't take long to cover the cost of the gears.
Anyway, DEFINITE improvement, well worth the effort and money.
Mark
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11-16-2005, 10:39 PM
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Hummer Guru
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Join Date: Oct 2005
Location: Charlotte, NC
Posts: 2,767
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DO IT.
Before I put my lift on my H2, my gas mileage was roughly 11-12 mpg. That was driving mostly city, minor highway.
When I put the lift with the 38's on it, my mileage immediately went from the 11-12 mpg to 8.6-9.1 mpg.
My logic was to install 4.56's which would bring the truck as close as possible to the stock configuration.
Point is, though I only installed them this weekend, I am averaging 11.0-11.5 mpg with way more power.
Excluding the labor because I did it, I've got less than 700 bucks in it. At a 2-3mpg increase, it won't take long to cover the cost of the gears.
Anyway, DEFINITE improvement, well worth the effort and money.
Mark
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11-16-2005, 10:51 PM
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Join Date: Jun 2005
Location: West and North
Posts: 469
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I'm running 37's (no lift) and noticed no difference in mpg....Still @ like 12.
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11-17-2005, 02:39 PM
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Join Date: Sep 2003
Location: NY
Posts: 249
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OC, what make did you install? I want to do that this spring my H2 doesn't like to move my 41's
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11-17-2005, 04:22 PM
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Hummer Veteran
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Join Date: Jan 2003
Location: Granite Bay, CA
Posts: 214
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I waited a long time before I finally changed the gears. Huge difference, wished I did it sooner. I also went with 4.56 gears.
__________________
03 H2 Sunset Orange Magna Charger w headers & cold air intake, 4\" Rancho lift, XTC Light Bars Front & Rear, 4.56 gears with Eaton Front Locker
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11-17-2005, 07:26 PM
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Hummer Guru
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Join Date: Jan 2005
Location: Oregon
Posts: 4,321
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by MUH_HUM:
I'm running 37's (no lift) and noticed no difference in mpg....Still @ like 12. </div></BLOCKQUOTE>
Did you change your gears? (I'm assuming you did) Do you ever tow anything? Is there a difference in power?
__________________
If it has tires or testicles, you're going to have trouble with it
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11-17-2005, 07:28 PM
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Join Date: Mar 2003
Location: TN
Posts: 123
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OC,
Where did you get your gears?
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11-17-2005, 07:44 PM
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Hummer Guru
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Join Date: Oct 2005
Location: Charlotte, NC
Posts: 2,767
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by H2 Rocks:
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by MUH_HUM:
I'm running 37's (no lift) and noticed no difference in mpg....Still @ like 12. </div></BLOCKQUOTE>
Did you change your gears? (I'm assuming you did) Do you ever tow anything? Is there a difference in power? </div></BLOCKQUOTE>
I'm astounded that he didn't notice any difference in power. Granted, they are a little smaller than the 38's but still, it wasn't even close. God forbid I try to tow anything.
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