Some years ago when I worked as a mechanic we got some in that
had not ever been changed.
After we changed them with new fluid and filters they would come back after a couple weeks saying we messed up their trany's.
They would never admit that they had started having problems with thier
trany's and decided it was time to maybe change the fluids and filter.
Funny how that never seems to fix it. HE! HE! HE! Kurt