I need my TCC tables edited, this transmission shudder is annoying!

Will pay $$$

 

Not sure a tuner can help you, sounds like you have the TCC problem common with the 4t60e.........
TCC lock up solenoid, the solenoid should read 20-30ohms, the TCC PWM 10 to 15 ohms. Check the ohm reading on the solenoids once when cold then once when hot. if they read different change the tcc solenoids.