this low load trans shifting is all TCU related no matter which tune you choose, MHD ecutek bm3 etc
once they figure a way around the TCU tune it will fix this problem, XHP is struggling with encryption on it, they estimate 2nd Quarter 2021 there should be Flashes for 8hp51 on the Supra
Great info and thanks for posting.
problem is the EU/USDM cars valves work differently, but i am sure you knew that.
it's always open and only closes on cold start.
Sad that the OPF cars are the Quietest by a huge margin :-(
also this is coded in your calibration file on ECU so you cant change...