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06-11-2007, 03:29 PM
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Hummer Veteran
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Join Date: Jul 2006
Location: Dallas, TX
Posts: 182
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Tranny & Gears
I have 2003 Magnasun Supercharged H2 with 37x13.5 Toyos and I just blew the tranny. I drive primarily street (don't hate me) and I pull an 8,000lb boat on occasion.
I am looking for your recommendations as far as upgrading the gears to 488's and any other improvements you think would be benificial.
Since I am not a big offroader does in make sense to go with 456 gears to help out with highway driving?
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06-11-2007, 05:23 PM
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Hummer Expert
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Join Date: Feb 2005
Location: new orleans
Posts: 506
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Re: Tranny & Gears
Sorry to hear about your tranny. How long did you have the blower on before you grenaded the tranny? I have the Mag charger and the power is awesome, but I keep wondering how long it will be before I have the same problem. I would like a completely bullet proof tranny setup so I can tow my 31ft. powerboat without taking any chances.
__________________
Maury Ballstein: I've got a prostate the size of a honeydew and a head full of bad memories.
03' White 2 Door H1 Pickup w/ 2in. body lift
05' BLACK SUT SLANTBACK Magnacharged w\ 12lb pulley, 6in. Fabtech lift, tierods, BUILT 4L80E tranny, 5.13 gears
66' VETTE STINGRAY
12' DODGE RAM 2500 CUMMINS 4X4 W/ FRONT & REAR LOCKERS
07' Z06
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06-11-2007, 06:14 PM
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Hummer Expert
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Join Date: May 2007
Location: PHOENIX AZ
Posts: 681
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Re: Tranny & Gears
A good rebuild with a Transgo kit and a new HP converter should do the trick. the factory clutch's are pretty stout .as far as gears if you switch them for 4.88's and ever go back to 35's it won't be too good over 75mph you will be reving good and high. if your wanting low speed power with the 37's the 4.88's are good .
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A government big enough to
give you everything you want, is
strong enough to take everything
you have.
-- Thomas Jefferson
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06-11-2007, 07:48 PM
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Hummer Veteran
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Join Date: Jul 2006
Location: Dallas, TX
Posts: 182
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Re: Tranny & Gears
Conrad, I haven't had the SC on that long but I was being stupid and I raced my wife in her tricked out BMW, I wanted to show her what the beast could do, anyway I was going about 10mph when I punched it, the SC kicked in full bore and thats when it happened  .
I was being stupid so it was more driver error than mechanical failure. I just hope I don't have an issue with the warranty coverage.
I too trailer a large boat, a 25ft wakeboard boat, and I wanted to upgrade the tranny so now I have my chance.
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06-11-2007, 08:02 PM
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Hummer Veteran
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Join Date: Apr 2007
Posts: 144
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Re: Tranny & Gears
Quote:
Originally Posted by wingnut2u
I was being stupid so it was more driver error than mechanical failure. I just hope I don't have an issue with the warranty coverage.
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I just covered my machine in Mountain Dew.....
Are you saying that you expect your tranny to be rebuilt under warranty?
Ever heard of "You play, You pay" 
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06-11-2007, 08:28 PM
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Hummer Veteran
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Join Date: Jul 2006
Location: Dallas, TX
Posts: 182
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Re: Tranny & Gears
My warranty covers transmission/drive train and Magnason SC is an "allowed" addition that is not "supposed" to the void warranty. Although I am sure they will fight me hard on that one.
Sorry you spilled your Dew! 
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06-11-2007, 08:51 PM
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Hummer Expert
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Join Date: Feb 2005
Location: new orleans
Posts: 506
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Re: Tranny & Gears
Quote:
Originally Posted by wingnut2u
Conrad, I haven't had the SC on that long but I was being stupid and I raced my wife in her tricked out BMW, I wanted to show her what the beast could do, anyway I was going about 10mph when I punched it, the SC kicked in full bore and thats when it happened  .
I was being stupid so it was more driver error than mechanical failure. I just hope I don't have an issue with the warranty coverage.
I too trailer a large boat, a 25ft wakeboard boat, and I wanted to upgrade the tranny so now I have my chance.
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Wing,
There is no way I would chalk this up as driver error. All you did was punch it. Why would anyone get a blower if they didn't intend on using it on occasion. My opinion is that "SH#@T HAPPENS" simple as that. At least you know that if you rebuild your tranny right, this is a problem you will never have again.
__________________
Maury Ballstein: I've got a prostate the size of a honeydew and a head full of bad memories.
03' White 2 Door H1 Pickup w/ 2in. body lift
05' BLACK SUT SLANTBACK Magnacharged w\ 12lb pulley, 6in. Fabtech lift, tierods, BUILT 4L80E tranny, 5.13 gears
66' VETTE STINGRAY
12' DODGE RAM 2500 CUMMINS 4X4 W/ FRONT & REAR LOCKERS
07' Z06
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