freeunit

Say i get 18 mpg with stock gears. What do you think i would get with 3.90's or 4.10's. If you have these gears or know what the answer might be please help me out.

nanaki

18mpg

sandcracker21

it all depends on how you drive it.....if u continue to drive it like u where previously, then it wont change much, maybe 1 mile to gallon

but ull probably punch it a LOT more, then thats how u loose mpg\

i have the 3.90s and i dont notice too much of a dif.

66_mustang_04

same mpg just dont punch it...i say even better gas milage if you dont punch it. Once you punch it thats all out the window...

kubball2005

With my 4.10s I am getting nearly the same gas mileage as I did before the gear swap. Like 66mustang said, if you don't get on it too much it isn't that big of a deal. I just filled up my car tonight and got just over 17 mpg.

mustangmike01

Man I dyoed 425rwd hp and I have 6 speed and 3:73 gears and s/c and I get 19 mpg

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Dan04COBRA

Short shift and keep your foot out of the gas and you can get some awesome gas mileage.