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Old 05-10-2014, 04:43 PM   #6
MidLifer
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Join Date: Apr 2011
Location: South NJ
Posts: 1,269
Re: Speedometer ratio

Cheapest is not always best. If this were me I would do the calculation using your final drive ratio and your tire size and buy the right gears for your trans.

Did your truck used to have monster tires on it? That reading sounds way off. The GPSes are right, not doubting those.
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