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07-13-2006, 03:48 AM
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Hummer Veteran
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Crawl Ratio??
I did a search and didnt find any results. Does anyone know the crawl ratio for a manual transmission with off-road package? Iv never needed to
be in 1st gear and 4 low at the sametime. Anyone know that ratio?
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Mercedes-benz Technician
06 H3 Black, 5-Speed manual, Black Rock Crawl wheels, flowmaster 40-series with 2 turndowns, Lux and Off-road package.
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07-13-2006, 03:56 AM
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Hummer Guru
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Re: Crawl Ratio??
Manual 69:1, auto 56:1 
ooops sorry forgot to post my source
http://www.hummer3.net/specs.html |
07-13-2006, 07:12 AM
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Hummer Guru
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Re: Crawl Ratio??
Not sure how accurate that is. Its from 2004 and they still list the two different rear axle ratios.  
From Hummer's site:
CRAWL RATIO:
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07-13-2006, 11:05 AM
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Hummer Guru
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Re: Crawl Ratio??
H3 came out in 2006, what they listed in 2004 is innacurate. The H3 uses only one gear ratio for any model in 2006 and that is 4.56:1.
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Originally Posted by Sewie
Not sure how accurate that is. Its from 2004 and they still list the two different rear axle ratios.
From Hummer's site:
CRAWL RATIO:
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07-13-2006, 03:43 PM
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Hummer Expert
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Re: Crawl Ratio??
Look at the H3 Brochure from the dealer.
It has both the auto and manual ratios. Sorry my book is at home.
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Desert Dan
H3 2006 Adventure/Lux/5-speed/sunroof/rock rails/underbody skids/block heater/Boulder Grey/ Defender Roof Rack
Jeep TJ Rubicon 2003
1988 Jeep Cherokee
Gone - But- Not Forgotten 4x4's
1994 Jeep YJ
Toyota 4x4 Truck(s)
1970 Jeep CJ-5
1962 Willys Wagon
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07-13-2006, 04:46 PM
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Re: Crawl Ratio??
You also need to factor in the torque multiplication of an auto, usually giving a 4x at the lowest revs needed for rock - crawling.
This will equate to closer to 200:1 for an auto transmission (and you won't need three feet while rock crawling).
-C
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07-13-2006, 09:20 PM
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Hummer Guru
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Re: Crawl Ratio??
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Originally Posted by Desert Dan
Look at the H3 Brochure from the dealer.
It has both the auto and manual ratios. Sorry my book is at home.
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This has been discussed a few other times, and sorry to tell you, the brochure from the dealer is incorrect. (That's why it has a little disclaimer on the bottom talking about errors.)
I have personally checked with the axle engineer in charge of the H3 (quite a few times on other subjects too  ), the brand quality chassis manager has been in our facility quite a few times, and the service engineer for this part is a close friend... it is a 4.56:1 ratio in the Diffs.
(Trans 1st gear ratio x transfer case ratio x axle ratio = crawl ratio)
AUTO
Off-Road:3.059 x 4 x 4.56 = 55.796 (rounded to 56:1)
Non-Off-Road: 3.059 x 2.64 x 4.56 = 36.825 (rounded 37:1)
MANUAL
Off-Road: 3.78 x 4 x 4.56 = 68.947 (rounded 69:1)
Non-Off-Road: 3.78 x 2.64 x 4.56 = 45.505 (rounded 46:1)
NOTE: The manual first gear might be 3.79, I came across two specs in my PAD drawings for this gear.
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07-13-2006, 11:03 AM
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Re: Crawl Ratio??
Sounds right to me, can't remember the auto, but know it is in the mid to high 50s, so I would say you have it correct.
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Originally Posted by HummBebe
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07-13-2006, 07:15 AM
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Hummer Guru
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Re: Crawl Ratio??
Quote:
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Originally Posted by GotSandH3
Iv never needed to
be in 1st gear and 4 low at the sametime.
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Sounds like you need to come out with us again.
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07-14-2006, 01:30 AM
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Re: Crawl Ratio??
69:1 sounds like a great ratio. How does that compare to brands such as Jeeps and Toyotas??
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Mercedes-benz Technician
06 H3 Black, 5-Speed manual, Black Rock Crawl wheels, flowmaster 40-series with 2 turndowns, Lux and Off-road package.
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07-14-2006, 07:59 PM
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Hummer Authority
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Join Date: May 2006
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Re: Crawl Ratio??
Quote:
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Originally Posted by GotSandH3
69:1 sounds like a great ratio. How does that compare to brands such as Jeeps and Toyotas??
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It's best in class for 2006 models, but the 2006 JK Rubicon Ultd will beat it next year. The source I used for this graph supplied different numbers than the ones in this thread. I'll update them when I get a chance.
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2007 slate blue 5spd w/ adventure package. Still pretty much stock ... dammit
Last edited by Wisha Haddan H3 : 07-14-2006 at 08:04 PM.
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07-14-2006, 08:02 PM
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Hummer Authority
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Join Date: May 2006
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Re: Crawl Ratio??
In the Automatic, the H3 will have best in class crawl ratio bar none. (Here are some updated graphs ... easier to read.
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2007 slate blue 5spd w/ adventure package. Still pretty much stock ... dammit
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07-14-2006, 09:21 PM
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Hummer Guru
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Re: Crawl Ratio??
Wisha, can you do a power to weight ratio comparison??
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07-14-2006, 11:26 PM
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Hummer Authority
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Join Date: May 2006
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Re: Crawl Ratio??
Quote:
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Originally Posted by HummBebe
Wisha, can you do a power to weight ratio comparison??
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Sure, but imho you have to factor in the gearing to get the whole picture. Here ya go.
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2007 slate blue 5spd w/ adventure package. Still pretty much stock ... dammit
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07-15-2006, 05:20 PM
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Hummer Veteran
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Location: Northwest of Los Angeles, just outside all the traffic
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Re: Crawl Ratio??
Quote:
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Originally Posted by Wisha Haddan H3
It's best in class for 2006 models, but the 2006 JK Rubicon Ultd will beat it next year. The source I used for this graph supplied different numbers than the ones in this thread. I'll update them when I get a chance.
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You forgot the Dodge Power Wagon with manual transmission at 78.3. That ought to be enough for any of you ladies.
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07-15-2006, 08:46 PM
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Hummer Guru
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Re: Crawl Ratio??
Actually, I found the 56:1 ration quite substantial and almost felt too low from my Jeep days.
After spending 4.5 hours cleaning red dust out of the interior, treating the leather, pressure washing the red tires back to black, washing the vehicle, all in 90+ humid heat, my personal crawl ratio is lower than any on that chart.
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Last edited by f5fstop : 07-15-2006 at 08:53 PM.
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07-15-2006, 10:40 PM
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Hummer Guru
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Re: Crawl Ratio??
poor f5....would you like me to get you a Lemonade??? |
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