Drain and fill every other to every 3rd oil change
Naturally the first time is a flush, depending on the condition and mileage.
I do not flush an (unknown) trans with over 60-70K miles

After my recent experiences and discoveries with the loveable slush box we know as the AW55-50/51SN, I thought I would jot them all down for those either having similar issues but finding no joy, or those facing similar issues and wondering what to do. I searched MVS for a deeper explanation for thi...

I wish I can give thumbs up on your thorough posts! Well done and thanks!