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03-13-2011, 06:09 PM
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#1 |
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Registered User
Join Date: Jan 2010
Location: Forsyth, Ga
Posts: 1,012
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12 bolt axle question
Are all 12 bolt c-10 axles the same from 60-66 other than gearing?
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03-13-2011, 11:34 PM
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#2 | |
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60-66 Nut
  Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,252
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Re: 12 bolt axle question
Not quite
The 12 bolt truck differential was first used in the '63 model year. The easiest way to ID a '63 12 bolt is by the pressed on backing plates. The '63 & '64 12 bolts used 17 spline side spider gears and corresponding axles. The '63 & '64 differentials had the panhard bar mount on the passenger side axle tube. The '65-early '70 are essentially all the same. Late in 1970 is when the increased the overall width by 1.5". Quote:
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