gears for auto?

[1HUBCAP]

I know this has been re-hashed several times,but i would like to know how gear changes have changed 60ft times and mpg's.This car is driven alot by my wife,so i don't want it to be crappy to drive daily and gas mileage to reallly suffer.We are trapping 1.90 60's stock,with a best of 1.89.I have some 3.55's on the shelf,but i wonder if 3.73's would be better?

Thanks in advance.

 

[Bad Intention]

I have 3.73 but i also have 3600 stall converter. But i get great gas milage with them. i drive 100 miles each way to the track running 80 almost whole way and gettin 23 MPG. I now couple people with bigger gaers and bigger converters and the are only cutting .02 better 60 than me. ihave cut at least 12 passes with 1.60 60'.

 

[1HUBCAP]

I have 3.73 but i also have 3600 stall converter. But i get great gas milage with them. i drive 100 miles each way to the track running 80 almost whole way and gettin 23 MPG. I now couple people with bigger gaers and bigger converters and the are only cutting .02 better 60 than me. ihave cut at least 12 passes with 1.60 60'.

Where did you get your converter? Do you have a trans
cooler?

 

[stang1971]

i have 4.10 gears in my auto... i have a 2800 stall in mine and cut low 1.7's

 

[Bad Intention]

Where did you get your converter? Do you have a trans
cooler?

Circle D
Never added different trans cooler.

 

[20zx6r07]

Anyone with 3.73s know what kinda mpgs to expect with mostly city driving and very little highway driving?

 

[stang1971]

Anyone with 3.73s know what kinda mpgs to expect with mostly city driving and very little highway driving?

i dont have 373 but with 4.10's i can get 348 miles to a tank.

 

[Turbosixx]

I have 3.73 but i also have 3600 stall converter. But i get great gas milage with them. i drive 100 miles each way to the track running 80 almost whole way and gettin 23 MPG. I now couple people with bigger gaers and bigger converters and the are only cutting .02 better 60 than me. ihave cut at least 12 passes with 1.60 60'.

What tires are you running?

 

[orgchem]

I just had 3.73s installed in my 2011 GT auto last week. Made a 600 mile road trip with them yesterday, and I ended up averaging 20.9 mpg. That was 80-85 mph most of the way. RPMs were definitely higher than stock, but IMHO not annoying (though they were on the very edge of being annoying... I think 4.10s would have pushed it over the edge for highway driving).

I'm riding on 275/35/20 tires out back and 255s up front.