gear ratio Low mpg?

[Italian024]

I have looked at just about all of the posts about gear ratio and still cant figure out my problem. I have a 04 6.0 cc 4x4 with 8in lift 37in tires 3.73 gear ratio and I get about 12.3mpg mostly drive 40-50 mph no traffic. I do not tow very often and if I do not very much weight. If I changed my gear ratio to lets say a 4.30 or a 4.56 maybe even 4.88 how would that effect my mpg’s. right now my truck runs like a tired old dog in the low end. It could be more than just gear ratio im not sure. Any help would be appreciated. Thanks

[Raul@Stealth Automotive]

def go with 4.30 and you will see an increase in fuel economy

[Italian024]

i need better fule economy fule in oc is about $3.35 here in idaho its $3.76 sucks
thanks if you know a good sorce for gears that would help too but i dont know how to install theme so maybe a good sorce in oc i will go there to get them installed. work is slow here so i will be going to ca to build some houses fires :-(

[Marty]

OC as in ocean city???

[Italian024]

orange county california

[Raul@Stealth Automotive]

I can get you the gears but i dont install them... you can expect to pay anywhere from $400.00-$500.00 an axle. yup a lot of house have burnt down down here.... let me know when your down maybe ill drive down their depending how south you are... im near LA....

[lifewitlooie]

Originally Posted by Raul@Stealth Automotive

you can expect to pay anywhere from $400.00-$500.00 an axle.

It cost that much to re gear? CRAP

[Raul@Stealth Automotive]

Originally Posted by lifewitlooie

It cost that much to re gear? CRAP

yup but not just anyone can do it... its actually quite complicated and you need the right tools to do it.... reason i havnt done it yet lol... but this year ill be going to 4.30 gears.....

[eazenutz33]

I got an 05 with 3.73 gears, gonna do the leveling kit with slightly bigger tres on the stock rims......33"-35" prolly.

is the 4.30 just gonna get better gas mileage at 40-50, or would it help when running 60-70 most of the time too??? I'm 90% on the highway. one $400-500 shot is nothing, but saving $10-20 at a time saves up over time.

[Raul@Stealth Automotive]

i wouldn't regear if your only doing 35's your talking about close to 1k for gears+labor per axle.... if you really wanted to regear i wouldn't go lower than 4.10