im wanting to get 4.10 gears on my V6. will this effect gas mileage at all? and what about my speedometer? how will i correct that? also, my near future plans are CAI, throttle body, and throttle body spacer, how will these all effect gas mileage? will i be able to notice much of a difference in horsepower with all those? and about the 4.10 gears, when im doing 60 - 70 what is the average rpm? what about higher speeds such as 100 - 130? what will the effect be there? and what are your opinions on a traction lock? good or bad for a V6? thanks ahead for the input!!

 

anyone?

 

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