I have a 90 GT and i am planning on putting in a set of 3.73's or 3.55's. how much will it affect my MPG. right now i have the stock 2.73's and i get around 23-25 mpg.
well with 2.73's i was getting around 27 hwy, dunno city. with 3.73's i get a bout 25 hwy and can get around 200 miles to the tank in the city. sometime more some times less. this was with stock motor.
Your gas mileage will improve with the extra torque now if you can keep your foot out of it. But highway, yes it will decrease. Its a bit of a trade off if u ask me.
I got a little better in the city and a little worse on the highway. If you do mostly city driving (stop and go like most of us do) your mileage will be about the same or maybe a little better. Overall, mileage was not affected much. I have 3.73's. Money well spent in my opinion. SOTP feel is amazing!
i had some 4.10's back in the day.....talk about get up and go.....................didnt even need to use 1st......loved em but im blown now so im gonna stick in some 3.55's.....