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03-21-2020, 10:00 AM
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Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,731
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Re: 1972 K10 gear ratios
ManNamedJed is on the right track. The ratios need to be close and some of that is dictated by what gear ratios are available in a given axle design. And some of that is based on general sizes of the gears themselves, carrier breaks, etc.
It is not a design parameter to have different gear ratio in front vs. rear. 3.73 is a good example of that. In the case of the Dana 44 front where 4.09 is a common ratio, and a Dana 60 where 4.10 is the common gear. You see 3.54 in Danas and 3.55 in GM's. All of these are close enough as running 5 psi pressure difference in tires front/rear. Guys who run Dana 44 front and 9" Ford rear with the 3.54 front/3.50 rear.
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44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax |
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