Quote:
Originally Posted by keene
Hey MiddleORoad, I think you are right. I'm getting 15 m p g in a 2007 Sequoia. It has a 4.7L but also a towing package with 17" wheels and 4.10 rear end gears. It has all kinds of torque, but it runs at 2500 rpm at 70 mph. I think if I can get it down to 2000 rpm, it will improve dramatically.
Does anyone know how to calculate what kind of mile age a higher gear ratio might get me?
The problem is, a new set of gears costs about $800. It sure would be helpful to get an idea of my savings before spending that much.
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The best way to be sure is to find a hill that you can go up in OD and coast down in gear above ~1500-2000rpm, ideally w/o stopping (maybe some kind of loop), get ~50-100 miles of travel through that loop, either using the tried and true fill-up/odometer or a scanguage and compare your mileage over the up/down loop to your mileage cruising on flat ground at the same average speed. The difference in how much you can pick up by regearing appropriately.
