Gears VS. Gas Mileage

[wrecked98]

I currently have stock 3.08 and get good gas mileage but I want to upgrade to 3.73's. I am just wondering how bad that will hurm my gas mileage?

-Tony

 

[mikeflys1]

Mine actually got better going from 3.08's to 3.55's. (with swapping the speedo gear so everything's accurate)

 

[Venom351R]

it wont effect your MPH enough to dent your wallet. If your really concerned w/ MPG then dont go much beyond gears b/c it gets alot worse after that.

 

[Jack's95gt]

You can figure on losing about 2 miles per gallon.

 

[Mrgreen94gt]

My mileage didn't drop any. It has dropped a little over time since I got the gears, but that's due to other junk.

 

[DFG 5OH]

In the city it COULD be better, that is if you dont get on it, because you could get into a higher gear, and still have the torque to get around...on the highway is the only time you'll see a difference, because you'll be driving at a higher RPM, but its not going to be THAT big of a deal.

 

[HISSIN50]

yep, it completely depends on what kind of driving you do and how heavy your foot is.

 

[94GTNJ]

I went from 2.73 gears to 3.55 gears. I drive about 70% highway and 30% city. I lost about 1 mpg. (maybe less)

But also during the swap I had all new axles, differential, seals, bearings installed, so that probably helped out also.

 

[qwick94GT]

We don't drive Mustangs for Gas Milage...

 

[1slow95]

My gas mileage went up in town going from 3.08's to 3.73's. I lost maybe 1 or 2 MPG on the highway.

 

[chefster]

ya my 308s are being swapped for 373s tommorow,so I spend alittle more on gas ,hey I don't golf and I love to drivr=e my stang..its worth it

 

[fiveo'cobra]

My gas mileage actually got better when i put in the 4:10's because now i'm in 5th much more often. Most of the time i used to cruise in 4rth because when i shift to 5th, the rpm's would drop rediculously low cuz of that damn overdrive. I get about 15-16mpg now in city driving. About 18-20 highway.