Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - 4L60E to 4L80 swap
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Old 04-24-2013, 06:42 PM
flynbrian48 flynbrian48 is offline
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You'll need to have the ECM reflashed and modify the harness for the new trans. LT1swap.com has pinouts for the harness change. I did the reverse, went from a 4L60 to 4L80 due to the big difference in size of the trans.
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