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Discussion Starter · #1 ·
I just received my superchips flaspack and cheange the tire size and gear ratio from 3.73 to 4.10 and I can not get my auto tranny to go into manual mode

Went from stock Sahara 18" tires to 295/70/18 trail grapplers with stock wheels and 3.73 gears
 

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What's the purpose of telling your computer you have 4.10 axles when you have 3.73s?

I don't think you're going to see any positive benefits, just confuse the tranny....

I could be wrong....
 

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Discussion Starter · #3 ·
I wanted to change the shift points which it did I went from 14 mph to 18.5 at 65 by doing that but know I couldn't get back into manual
 

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It seems like you are just jacking your computers calculations up.
 

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14 to 18.5 mpg at 65 mph
I don't think so. At 65 mph you're going to be in 5th gear, no matter what gears your computer thinks you have. And, your gas mileage will be the same, too. But the EVIC readout will probably be all messed up.
 
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