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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
 
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  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
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63fairlane63
    
Selected as Best Answer
as a general rule divide pinion into ring gear.
posted:  December 25, 2010
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