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Discussion Starter · #1 ·
If at the present moment with the stock 3.27s in my rear at 80 mph in od 4th gear ratio of .7 i am turning around 2400 or 2450 rpms, what would my rpms be at 80 mph with 4.10s? i tried using the tech calculator but they don't have my exact transmission i found one close but i cannot be certain how close it is it says that with the 3.27s i should be doing 2350 and with the 4.10s i would do 2919 but i don't know what do you guys think?
 

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4.10/3.27X2400=3009
4.10/3.27X2450=3072
 
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