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4 speed vs 6 speed

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Old 11-30-2011, 09:30 PM
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Default 4 speed vs 6 speed

well ive been thinking on swapping my 4 speed tranny to a 6 speed. but first i wanna ask some questions is there good gains by doing the swap? what all do i need to modify to make the 6l80 fit in my 07 nnbs crewcab?
Old 11-30-2011, 09:41 PM
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Search for Iamkenniff. He's the only one on here I can think of that's done the swap.
Old 11-30-2011, 11:10 PM
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^^hope he chimes in....and bumpp
Old 12-01-2011, 12:19 AM
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For the cost of the convertion,money better spent would be on cubic inches, if going faster is what you ment by "GAINS"
Old 12-01-2011, 02:07 AM
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HP/TQ goals?
Turbo?
Nitrous?
Supercharger?


550rwhp and less with the right tune i dont see the 6spd being a bad option. 575+ you better hope it holds up in a brick. I do not abuse my truck, i make a few passes and im done. I make 400rwhp with mine and its fun to drive. Search for my thread it gives you a list of parts and what i used. I recommend you use a harness from a 2007 denali to keep you from changing sensor plugs and stuff like i had to.

Pm if you have any questions that my thread doesnt explain
Old 12-01-2011, 12:43 PM
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Im going to run a 6.2 with cam n stall full.bolton.411 gears
Old 12-01-2011, 12:43 PM
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Oh and all motor
Old 12-01-2011, 12:45 PM
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thats how i run mine an it does just fine
Old 12-01-2011, 01:00 PM
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Oh forreal badass but u think.its worth swapping.to.a.6l80?
Old 12-01-2011, 01:01 PM
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Whats the pros n cons?


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