ALLISON TROUBLE? - Diesel Bombers

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Chevy/GMC Duramax 07.5 & UP LMM Discussion of Chevy and GMC Trucks with LMM Duramax Turbo Diesel Engines

Lets use this one to talk about any trouble out of the LMM allison, stock or otherwise. Include HP/TQ numbers to help others. Thnx -... JOIN NOW TO REMOVE TRACER

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  #1  
Old 11-09-2009, 12:35 PM
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Default ALLISON TROUBLE?

Lets use this one to talk about any trouble out of the LMM allison, stock or otherwise. Include HP/TQ numbers to help others. Thnx -

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  #2  
Old 11-10-2009, 09:50 AM
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Are you having issues? -

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  #3  
Old 11-10-2009, 12:22 PM
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No issues yet. I was wanting input on peoples expieriences and noticed there wasnt a section. Just trying to get people to share maybe their mishaps and issues, as well as finding the "limits" on their combos as well as how far the stock ones been pushed. Knowledge is power which is why were all here -
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  #4  
Old 11-10-2009, 02:08 PM
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Well nice post, and it should help many. We have found 430 rwhp to be a strong number that they can live nicely at. Much more and they start limping. -
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Old 11-17-2009, 12:29 PM
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Somebody,anybody! Whats breakin'? Whats holdin'? What are ya runnin?!?!? -
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  #6  
Old 11-17-2009, 02:23 PM
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Mine held roughly 500 rhwp for about a week before its first limp. This is with alot of hard driving. Normal tuning put me about 400 that is where the most abuse was., that was ran for approx. 15000 miles. -
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  #7  
Old 11-17-2009, 02:26 PM
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i work at a tranny shop and reverse and 1st and second ar the problem areas becuse of the valve body -

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  #8  
Old Yesterday, 11:43 AM
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In the Allison's? 4th and 5th I believe are the weak links because of the pressure the C2 clutch pack receives. I actually think 1st and second are close to bulletproof -

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