When reading that 24 year old Lubrizol paper again,
the words
“fill for life”
caught my eye.

Are there 1999+ Chrysler transmissions where factory ATF+4 is not recommended to be changed, ever?

My fuzzy memory is that a few of the Mercedes
and/or Getrag auto trans
were “fill for life.”

What company’s trans fluids were in those sealed units?

I would not think that in 24 years
that there would not be ANY
atf improvements.....