I wonder if the TSB is a red herring if your vehicle wasn’t part of the TSB range but was still shifting poorly. Mine was made years after the TSB was released but has obviously bad shifting.
I was looking through the docs in the Toyota Information Service archive for the 200 and found a procedure for “reinitializing” the transmission to reset the timing and pressures and lockup ranges for the transmission. I wonder if the reinitialization is happening as part of the TSB procedure regardless of transmission software version update.
Waiting for our next oil change to find a dealer that will play ball on the transmission.
The real initialization procedure in my fsm is a very involved driving pattern sequence that is speed and time and stop sensitive. I doubt anyone has ever done it. Ive also never seen the oft referred to “learning” of the throttle and transmission that the vehicle supposedly does automatically.