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Re: P2175 Sudden downshift to 1st gear 6L-80
Posted to Transmission Forum on 3/10/2021 5 Replies

Any codes in other modules? If its not a dealer reman I would question that the tcm was really "new". My understanding is used modules in the 14 up trucks won't fly. The tcm, solenoids, and pressure switches are made together. The valve body is separate.

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