Which i believe is essentially remapping the TQM software settings (ie torque management) from the factory. It isn’t adding any power but it’s making what is there available sooner and faster in the throttle curve. It gives you that seat of the pants feel/smile.The U9 will not create any issues at all related to the tranny. It only impact throttle sensitivity.
The middle man software that’s normally limiting that available power is being changed or altered if you will. It all depends on how much the settings are changed as to how far you are pushing the tranny. My assumption would be the tranny should be able to handle all the power on tap but have no idea if GM tuned the tranny assuming the TQM was in place. It’s why diesel tuners often recommend only towing on level 1 or 2 as an example, drivetrain can’t handle the power available at heavy loads…things start to break. Once factory settings start getting monkeyed with, unless you truly know what’s been changed and what that means, you are trusting a web page selling you something that it’s “completely safe”…what actual recourse do you have if it isn’t? Diesel guys been learning these lessons for a couple decades
I am not even remotely stating any of these throttle controllers are pushing unsafe mechanical boundaries, I haven’t seen the tuning, had enough hands on experience, nor done enough digging to have an educated opinion. I will always argue re-tuning or remapping of software in real time does have at least some risk.