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  1. fuzzytoaster

    Highway speed gear 3.07 vs 2.87

    The math I put in a calculator came out to be this: Gear Ratio (2:1) Tire Height (in.) Engine RPM Transmission Gear Ratio (7th gear) SPEED 2.87 46" 2600 .78...
  2. fuzzytoaster

    Highway speed gear 3.07 vs 2.87

    Having installed both gear sets on trucks (and the likely source of the 2.87's mentioned) I can provide some insight... you can't go wrong either way. The loss on the low end power isn't noticeable and provides many perks: better MPG, lower cruising engine RPM, less fan kicking in, and less wear...
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