I own a 2022 GX460. There is a lot to like about the GX. But would love to address the poor throttle response AND abismal factory TCU tune, plus obtain any possible HP/Torque gains that toyota may have left on the table. For disclosure, I have installed the Shift Power throttle re-mapping device and it does improve throttle response, but does nothing to address the poor transmission tune. The GX seems to always upshiflt too soon, doesnt hold a gear long enough, IMO. This is likely to improve the MPG by keeping engine revs low at all times. I would like to solve several problems at once, and the factory TCU tune is a big one for me.
I've researched tunes that would be compliant in CA (CARB EO compliant tunes) and Overland Taylor's "Overland Torque Tune" seems to address many of my wants listed above. I have reached out to Quoc at TK-421 Tuning (TK-421 Tuning Inc. - https://tk421tuning.com/supported-vehicles) and for some reason, he is not able to tune the 2022 model year. According to Quoc,
"The software we use has to be able to communicate with the 2022 computer which we don’t have the capabilities to as of yet. Each MY computer is different even though they have the exact same functions. There is no difference between 22/23 other than the computer. Once it becomes available the tune will be ready within a day."
Seems that tunes are available for 2010-2021 and 2023, but not 2022.
Does anyone have insights into this issue with accessing the ECU/TCU on 2022 GX460 model years?

I've researched tunes that would be compliant in CA (CARB EO compliant tunes) and Overland Taylor's "Overland Torque Tune" seems to address many of my wants listed above. I have reached out to Quoc at TK-421 Tuning (TK-421 Tuning Inc. - https://tk421tuning.com/supported-vehicles) and for some reason, he is not able to tune the 2022 model year. According to Quoc,
"The software we use has to be able to communicate with the 2022 computer which we don’t have the capabilities to as of yet. Each MY computer is different even though they have the exact same functions. There is no difference between 22/23 other than the computer. Once it becomes available the tune will be ready within a day."
Seems that tunes are available for 2010-2021 and 2023, but not 2022.
Does anyone have insights into this issue with accessing the ECU/TCU on 2022 GX460 model years?
