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Different flywheel and torque convertor, same transmission. Don't know about the bell housing but it's removable.

Vernon
 

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I thought I read somewhere where the 8.1l converter is tighter than the d-max. Which I think would be better. Mike L is the man to ask.
 

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Gas converter is looser I have a stock converter out of my 06 lbz with 3,000 miles on it. Been to lazy to send it in on core
 

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send him a pm or call his shop
 

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The 8.1 Alli is identical to the Duramax unit. Only the converter is different ( 8.1 is looser ) and TCM strategy is different because the 8.1 needs to rev higher to get into its powerband.
 

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Mike L.;1559272; said:
The 8.1 Alli is identical to the Duramax unit. Only the converter is different ( 8.1 is looser ) and TCM strategy is different because the 8.1 needs to rev higher to get into its powerband.
I'm not sure what you are saying as to looser. Could you explain the difference? thanks
 

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the duramax has a tighter converter less slip = less stall, The gas converters are loser and have more slip = more stall
 

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lol I take it the alli needs rebuilt for that price
 

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ripmf666;1560847; said:
the duramax has a tighter converter less slip = less stall, The gas converters are loser and have more slip = more stall
Thanks for the response. I thought the stall point was when the engine stalled when the tranbrake was locked and it was at its max torque so not able to produce more slippage. Its easier to remember your reply.
 
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