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  1. L

    Factory 3.92 Gears. MPG changes with 34-35s?

    Bump. Seriously...no one with an EcoDiesel has increased tire size and has a MPG report?!
  2. L

    Factory 3.92 Gears. MPG changes with 34-35s?

    2021 4x4 EcoDiesel with 3.92 gearing. I don't tow much at all and do tons of freeway driving. Yeah...the truck was the only one I could get my hands on otherwise I'd have opted for different gearing. If I go with a 34" tire I'll be at about 3.67, and with a 35" I'll be at 3.58. I'm thinking the...
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