As an example:
If the torque converter clutch applied at 35 MPH (as indicated on the speedometer) with the small tires, then the torque converter clutch apply will STILL happen at an indicated 35 MPH on the speedometer with the larger tires. Nothing will EVER change in that regard unless the tuning is changed or the speedometer is recalibrated. The tires do not change the engine RPM/driveshaft speed relationship; they only change the actual road speed vs. the speedometer.
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