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Power Strokes
6.4 Aftermarket
Changing gear size
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[QUOTE="cbrown, post: 201764, member: 1577"] Ok, so using that equation, I get 4.26 calculated with a 35" stock tire and 4.39 with 34" stock tire. I had the lariat 20s stock, so not sure what the stock ones exactly were, but if I recall they are between that. Is there a way to calculate what rpms I would be turning at a certain speed depending on gear size? Also what effect would larger gears have on fuel mileage? Im certainly not overly concerned with it, however I do like being able to cruise around without watching the gauge drop. It would make sense to me that regearing to a stock ratio would improve the mileage? Stock gears + larger tires = dropped mileage. Gears to compensate+ 40s = stock truck mileage? Thanks, Chris [/QUOTE]
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