gear ratio Low mpg? - Ford Powerstroke Diesel Forum
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post #1 of 20 Old 10-28-2007, 09:29 PM Thread Starter
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gear ratio Low mpg?

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
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post #2 of 20 Old 10-28-2007, 09:38 PM
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def go with 4.30 and you will see an increase in fuel economy


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post #3 of 20 Old 10-28-2007, 09:46 PM Thread Starter
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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 :-(
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post #4 of 20 Old 10-28-2007, 09:53 PM
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OC as in ocean city???

2001 F250
11.62 @ 115.79
Owner of Marty's Diesel
Elkton, Maryland
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post #5 of 20 Old 10-28-2007, 09:54 PM Thread Starter
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orange county california
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post #6 of 20 Old 10-28-2007, 09:55 PM
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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....


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post #7 of 20 Old 10-28-2007, 10:03 PM
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Quote:
Originally Posted by Raul@Stealth Automotive View Post
you can expect to pay anywhere from $400.00-$500.00 an axle.
It cost that much to re gear? CRAP
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post #8 of 20 Old 10-28-2007, 10:09 PM
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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.....


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post #9 of 20 Old 10-29-2007, 07:42 AM
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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.
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post #10 of 20 Old 10-29-2007, 08:19 AM
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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


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