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08-27-2024, 07:14 AM
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#1 |
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Senior Member
 Join Date: Aug 2003
Location: Conyers,Ga.
Posts: 7,288
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Re: '67 12 bolt gear ratio
I know in 50 plus yrs It could’ve been changed, but you could always check the code on the axle tube. Should be on the passenger side between the trailing arm mount and carrier housing. It usually anywhere from 12 to 3 o’clock on the tube.
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08-28-2024, 12:00 AM
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#2 |
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The Older Generation
  
Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,585
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Re: '67 12 bolt gear ratio
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If you find the code on the axle tube or housing here are the conversion charts I posted a few years ago. http://67-72chevytrucks.com/vboard/s...d.php?t=578793 Check posts #8 & #19 for a couple of the code stamp locations.. .
__________________
Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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08-28-2024, 04:04 PM
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#3 |
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Senior Member
Join Date: Jan 2016
Location: Sugar Hill GA
Posts: 369
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Re: '67 12 bolt gear ratio
If you don't want to pull the diff cover you can use these two calculators.
Get you tire size https://tiresize.com/calculator/ To find you gear ratio take the truck out and use your GPS to get an accurate MPH and a tach to get your RPM in top gear at like 70mph. Then put all that info onto https://www.summitracing.com/popup/c...iAAEgIFzvD_BwE
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1967 C10 Step side 1970 AMX 390 1977 Datsun 280Z highly modified with '95 LT1 power |
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