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Old 06-14-2008, 05:20 PM   eBay Motors  #1 (permalink)
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Allison Question

I'm planning on running oversize tires and some power adders on my 07 duramax, i've read some people reccomend transmission upgrades, what's the deal, is the allison not that great of a trans? I thought it had a pretty good reputation?
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Old 06-14-2008, 05:24 PM   eBay Motors  #2 (permalink)
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they are good for around 90hp extra, but if you go adding more rolling resistance(tires) and more power it makes it hard on any trans, the combination of both can cause less trans life. I would do transgo,torque converter and valvebody, but you could also get a ats trans such as a stage 2 and be good for around 500-600 hp.

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Old 06-14-2008, 05:26 PM   eBay Motors  #3 (permalink)
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Originally Posted by chris60098 View Post
I'm planning on running oversize tires and some power adders on my 07 duramax, i've read some people reccomend transmission upgrades, what's the deal, is the allison not that great of a trans? I thought it had a pretty good reputation?
Does have a good rep,keep in mind,they[gm/allison]didn't plan on this much moddin happening,if you use it like it's intended then you won't have issues.But if not pay 2 play:rockin:rockin
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Old 06-14-2008, 05:29 PM   eBay Motors  #4 (permalink)
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im new as well. ive been researching most of the common upgrades that people are doing and you deffinitely need to beef up your trans if you plan on adding a lot of hp. suncoast makes a kit that really good as well. (stage iv kit; includes torque converter)
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Old 06-14-2008, 05:58 PM   eBay Motors  #5 (permalink)
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well, i'm not gonna get carried away with the hp mods, intake, exhaust, the quadzilla tuner for the pdf delete, that'll probably be it, but i am gonna run some pretty big tires, and i was absolutely planning and changing my gear ratio, but any other trans. upgrade ideas would be appreciated.
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Old 06-14-2008, 06:02 PM   eBay Motors  #6 (permalink)
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i agree with ^^^ just dont get carried away with the 135 tune
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Old 06-15-2008, 12:05 AM   eBay Motors  #7 (permalink)
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Start with a Transgo Jr. 2-4 hour install and will help with holding Power.
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Old 06-15-2008, 12:10 AM   eBay Motors  #8 (permalink)
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Thanks for the patience I'll be in touch..
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2006 GMC 4x4 CC/SB/sle1/LBZ**312,000 miles!!** PPE HOT+2 225 TUNE beeeyotch:-)AutoMeter egt/boost Suncoast 5 trans w/1056TC!,billet in/out shafts/MagHytec pan!!,M/A built T-Case,4 in.str8piped,5%tint all around......
2007 Chevrolet 4x4 cc\sb,lbz.......SOLD to blunova
Also, I speed and don't come to complete stops at stop signs.


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Old 06-15-2008, 05:46 AM   eBay Motors  #9 (permalink)
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Allison is one of the best automatics out there, but it is made for towing not racing or playing. If you go over 500 ponys you need to buy a kit. I do not know of any stock automatic that handles 500 horses too well.
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Old 06-16-2008, 07:41 AM   eBay Motors  #10 (permalink)
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Ya, you also have to remember, its not just the hp, its the torque too. Your starting out stock with 650ish ft-lbs of torque. Add a tuner and thats another 150 or so. Thats a lot of strain on any transmission. But like everyone else said, its built to handle anything a STOCK motor can throw at it. Leave it stock and it'll last a LONG time. Otherwise, you gota pay to play!!!!
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