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14 Silverado 5.3l turbo WOT harsh shift

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hemiller3
14 Silverado 5.3l turbo WOT harsh shift

Hello, looking for some advice on a turbo silverado. Part throttle shifts feel good to the customer, however 1-2 and 2-3 WOT are very harsh and not crisp at all. Tried a few things I read on HPt, not really making much progress. Hoping someone could give me a few suggestions on what areas to work on. Thanks for any help.

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