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

Ring and Pinion Gear change

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Old 04-07-2010, 04:39 AM
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Ring and Pinion Gear change

Has anyone changed to a 3.42 gear ratio, and what effects did it have on mileage and shift points? Don't normally tow heavy and thought it would help out on mileage. Anyone have any thoughts?

Last edited by bettamsw; 04-08-2010 at 09:14 AM. Reason: add info
Old 04-08-2010, 10:46 AM
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any changed to a lower gear ratio??
Old 04-08-2010, 11:48 AM
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It might help your highway mileage but would make your in town go down. Im curious to see the results also
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