with exc. opin posts by JCL & Weasel.
My fave bro-in-law owns/runs an AAmco Trans joint in north
Jersey and he suggests half his trans work is on cars that have
recently had the auto trans fluid "changed/flushed", etc.
The age of some of the heaps he gets obviously has some
correlation, but a "feel good" auto trans fluid change is not
rec'd by him.
Fwiw, he does a few assorted BMWs per month, and says if
he would not touch the fluid in those until the trans croaks.
GL,mD