12 bolt rear end codes? - Chevelle Tech
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Transmission & Driveline Transmissions and Differentials

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  #1  
Old Mar 22nd, 09, 2:58 PM
ripper1711 ripper1711 is offline
john
 
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Default 12 bolt rear end codes?

I have a 12 bolt rearend that im rebuilding and converting to a possi. I have sand blasted it removed all the bearings and gears. The codes on the rearend are CKD 0826B, GM52, 3969278NF, H48, CON1, E stamp under cover, 1234567890. I have surched the Internet and the 3969278NF is supposed to be a 71-72 but date code dosent match. Please help make sense of this because im confused.
Thanks
John
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  #2  
Old Mar 22nd, 09, 3:08 PM
Mike Mike is offline
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Default Re: 12 bolt rear end codes?

Appears to be from a '70 per the info I've got.
The 3969278NF was used '70-'72.
Your code CKD was '70.
Possible that the 8 in the H48 is a 0 ??
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Old Mar 22nd, 09, 3:21 PM
bcice bcice is offline
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Terry
 
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Default Re: 12 bolt rear end codes?

That casting nimber was used from 70-72 but chevellestuff.com shows that your rear is a 1970, because that is the only year that shows a CKD code. Meaning it was a 2:73 ratio.
08 means the 8th month, 26 is the date and B means it was built at the buffalo plant
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Old Mar 22nd, 09, 3:57 PM
ripper1711 ripper1711 is offline
john
 
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Default Re: 12 bolt rear end codes?

i think its a 9 the 8 9 look close alike but not a 0 diffently
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Chevelle Tech > Mechanical > Transmission & Driveline      Current Topic: 12 bolt rear end codes?
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