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Gear ratio change

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Old Sep 5, 2012 | 06:53 PM
  #1  
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deere55
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Gear ratio change

I think I am going to go ahead and change my ring and pinion. I'm tired of getting 14mpg with a 5 speed diesel. What kinds of things am I going to need to know to do this swap? I'm not even sure exactly what axles I have.

Assuming I have a 4.10 gear ratio right now, what kind of mpg gains would I be looking at with 3.73 or 3.55?
 
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Old Sep 5, 2012 | 07:28 PM
  #2  
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How this helps
AXLE RATIOS
 
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Old Sep 5, 2012 | 07:35 PM
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Well hold on..more factors play into your fuel economy than just your gears. What do u use the truck for? If its used for towing, or just in town use, its not going to help to change gears.
 
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Old Sep 5, 2012 | 08:08 PM
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Nah, It's not a townie truck, nor is it a frequent tower, more of an occasional tower. I'm getting 14 mpg highway unloaded ...

According to that link I would only see a .5mpg improvement? How are guys getting 18-20 on these trucks ?
 
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Old Sep 5, 2012 | 08:27 PM
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Volvo92906
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They arent.
 
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Old Sep 5, 2012 | 08:58 PM
  #6  
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deere55
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Gerrrrrrrrrr
fine maybe you've talked me out of it.

Just seems sad, my 5.4 gets 13.5 highway, almost as much as my diesel. The 5.4 is 1700 at 60, the diesel is 2300 ...
 
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