3rd Gen Engine and Drivetrain -> 2003-2007 5.9 liter Engine and drivetrain discussion only. PLEASE, NO HIGH PERFORMANCE DISCUSSION!

Gear Swap

Old 08-31-2009, 03:33 PM
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Gear Swap

I'm running 35" tires and thinking of installing 4.10 gears. If I swap the gears, would I gain a few mpg since the 4.10 will put it back in its powerband?
Old 08-31-2009, 04:03 PM
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Wink

You won`t gain a FEW mpg. , maybe a half mpg. if you`re lucky. You still have the larger heavier rotating mass robbing mpg.

Don`t spend the $$$ on a gear swap , and ever expect to recoupe your money in extra fuel mileage.
Old 08-31-2009, 05:00 PM
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But your tranny or clutch will like it.
Old 08-31-2009, 06:06 PM
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Thanks.
Old 08-31-2009, 07:49 PM
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I still get pretty good millage with my tires 21-22 highway. Not worth a gear change in my opinion.

Michael
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