Thread: Sold Original GM 4.56 High Impact 12 Bolt Ring and Pinion 3917973
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Old 05-17-2022, 07:32 PM
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Default Original GM 4.56 High Impact 12 Bolt Ring and Pinion 3917973
This is an Original GM 12 bolt high impact ring and pinion also known as the "COPO" 4.56 gears.

The pinion is stamped with part number 3916231 dated 1/69
The ring is stamped with part number 3916230 dated 8/70

I believe as a set the part number is 3917973

Price is $500 shipped or best offer
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