12 bolt carrier breaks - Buick Forum - Buick Enthusiasts Forums

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Old 07-26-2016, 05:53 PM
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Join Date: Jul 2016
Location: Charlotte Mi
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Default 12 bolt carrier breaks

Hello out there!
Looking for some help on pre- corporate 67-71 (69 specifically) 12 bolt 9-3/8 Buick rearends.
Currently have 2.56 gear ratio and looking to swap for 3.07 or 3.24. Is this possible with my existing carrier or is there a break point that a different carrier was used? Not finding much info on the 9-3/8 rearend.
Thanks in advance
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