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well i became interested when i rode in a new 6.7 with the g56. it runs about 17-1800 at 70mpn. i run around 2100 maybe a little more at 70 mph. do i have 4.10's? i also have a nv5600. i dont think 6th is different because another buddy of mine has the 6.7 with the g56 and his rpms are the same as mine
 

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a g56 spinning that kind of rpm's at 70 sounds like 3.42's

I run almost dead on 2000 at 65, around 2100 at 70 with the truck in my sig. And NV5600 does have a tighter OD. There are tons of thread listing the ratios and quick search should turn up what you are looking for. :thumbsup:
 

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"MR. ESAFO TO YOU!!"
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at 70mph i'm at 2150 with 4.10'z
 
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