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Im getting my 3.73's put in friday and i have the diablo sport programmer on my car... how do I fix the speedo with the programmer?
 

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modify tune. I think its a traction option, not sure dont have it in front of me. Then it gives you 3 options... pick the gear ratio and move the arrows to whatever gear you got. Then install tune. Its easy.
 

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no it wont mess up the tune.. because thats the only thing different you changed in the tune is the gear ratio.. just wondering are you auto or manuel?
 

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+2 (from what my friend said)
 
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