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I Have a 2016 Mustang GT Premium 6R80 and my father has a 2021 PP1 Mustang GT Premium MT. He supercharged his and the 3.73 gears were spinning to much so he decided to go with a different Gear ratio. My car stock had the 3.55 in an aluminum Pumpkin. We took the 3.73s with cast iron Pumpkin out...