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11-06-2020, 03:37 PM
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#1 |
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Registered User
Join Date: Sep 2018
Location: Sacramento,CA
Posts: 85
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12 bolt posi information
So I just purchased a 12 bolt Posi rear end. It’s a truck rear end with the track bar. it has 373 gears in it. My question is how many different spline axles do these come with? I was reading somewhere that they come with a course axle? Looking to see any and all info on this. Basically I’m looking to be able to buy all new bearings and seals for it and just freshen it up and put in my truck
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70 custom10 swb fleet side 454 th400 |
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11-06-2020, 04:54 PM
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#2 |
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Registered User
Join Date: Jul 2012
Location: Whitehorse yukon
Posts: 1,218
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Re: 12 bolt posi information
You can look on the right side tube for code stamping which can help confirm year of manufacture
Late 70 and up axles will be a bit wider 63 to 69 axle will be a bit narrower |
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11-06-2020, 07:10 PM
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#3 |
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Senior Member
 
Join Date: Aug 2018
Location: Western Colorado
Posts: 1,165
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Re: 12 bolt posi information
I believe pre-66 has a different spline count than 67+. Otherwise, axle seals and bearings are the same.
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1964 Chevy C10 - Gen IV 5.3 Restomod http://67-72chevytrucks.com/vboard/s...d.php?t=768632 1968 GMC C15 - Gen III 6.0 Restomod http://67-72chevytrucks.com/vboard/s...d.php?t=772047 1969 Chevy C10 - Restoration http://67-72chevytrucks.com/vboard/s...d.php?t=809184 1978 Chevy Scottsdale K20 1993 Chevy C1500 - 5.3/T56 swapped 2008 Silverado Duramax |
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