I'm planning to change the transmission fluid of my 16 SR5 4WD myself soon. I want to replace the filter if possible, which means I need to take off the transmission fluid pan. Don't need a complete flush. Anyone knows if there's a detailed write-up with step-by-step instruction and all part numbers needed? There are some videos but no detailed part numbers included.

A related question is which diagnostic tool/OBD reader is recommended to read the trans temperature. I saw it somewhere but can't find it now. I also have a 17 Tacoma and hope the scan tool can be used for both trucks. I do have a temperature gun. Will it work if I just point at the pan to get correct trans temp needed?