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Old 09-17-2019, 08:10 AM   #3
Jimabe
 
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Drives: 2018 Red ZL1
Join Date: Mar 2018
Location: Spring grove IL
Posts: 190
Yes, he has. The Trans CM wasn't touched. It also drove OK for a brief period after i picked it up. Can something in the ECM Tune make the tranny downshift instead of upshift? Not sure where the Programming resides that makes the A10 shift...

The weird thing is it shifts normal under light and normal acceleration, but only does this up at the big end...
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