Gear swap and speed/abs issues with EFI locked ecu

LMM truck with 5 position switch.Before we did a gear swap I called the shop that tuned this truck 7 years ago and he said to buy a flash tuner for speedo calibration. We tried Superchips, Hypertech, HPT will not load ECM says locked. My EFI live will access trans side but adjusting anything there does nothing to correct speedo or output MPH. We installed 4,56 gears and customer had 35" tires installed. Has Speed miss match from from to rear. Nothing I change in speedo under trans section does anything except output 40 tooth, if I change that it will then set 1st ratio codes. Any Ideas to unlock or fix speedo/abs codes miss match.

Must be changed in the ECM. I've played with it extensively on that platform, using multiple TCM combos from other GM vehicles. Seems it reads the pulse wheel on output shaft and does not care what the TCM speedo calibration say.

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