These service manuals have been helping me understand the transmissions, I just wish there were some videos or history of personal experience.
https://akpphelp.ru/assets/template/redesign/files/guidelines/zf8hp45_70_rukovodstvo_manual.pdf...
I have found a complete 8HP51 (15k miles) locally out of a 2021 GR Supra for 1k with torque converter and valve body. Seller claims car had a error on the dash and sometimes gets stuck in second gear (could it be first gear lockout?) and sometimes performed normally. No metal shavings and clean...