The main problem that not only those two solenoids is the problem, cause all of them working incorrect since the problem was discovered. Thats why im trying to find new information.They maybe old, but was also asked about complexity. Those 2 TSBs show no easy backyard fix for anything related to the transmission solenoids, etc., as well as showing location of each of them. Don't know why the 23 July 2021 TSB is not recorded in Hyundai TSB listings or expanded, other than it's an official Hyundai document. It does address one specific complaint, however.