The ATF life is the same as your gearbox life. If something happened to the gearbox, means you need to change ATF together. So if your gearbox kong after driving 5 years, means that is the life of your ATF. Depends on the damage, need to replace some parts/whole gearbox to get it running again. Open gearbox = change ATF.

This is lifelong/lifetime ATF definition.

This post has been edited by RicoT: May 11 2021, 02:22 PM