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OldRide Answers Home Using OldRide Answers Ask a Question   Browse Questions In: AMC Buick Cadillac Chevrolet Chrysler Dodge Ford Lincoln Mercury Oldsmobile Packard Plymouth Pontiac Studebaker Volkswagen Other Makes Classic Trucks  General Topics General Questions Help Identify Classic Car News General Restoration Vehicle Maintenance Site Suggestions & Comments            Search Questions:    sassy37      How to find the Gear Ratio ? '71' chev truck rr, the pinon has 10 teeth - ring gear has 44. it rotates 3 full turns + 1 tooth, what ratio is it? Thanks posted: November 22, 2010      Question is Closed    What is OldRide Answers?     Answers (2)   retiredpartsman      a 10- 44 gear count would be a 440 to 1 ratio . are you sure on the ring gear tooth count ,my books do not show that ratio .there is a 410 to 1 ie 10- 41 ratio listed for the 20 and 30 series trucks.the tooth count should be on rinr gear by the part number.there are a lot of aftermarket gaers around ,i had a set of 5.13s in a 57 chevy car one time.if part # is ongear will gladly resurch for you. posted:  November 22, 2010   63fairlane63      Selected as Best Answer as a general rule divide pinion into ring gear. posted:  December 25, 2010

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