The last time i changed my ATF in February '02, I really couldn't tell any difference in Before and After, honestly.
The previous owner told me he'd Mobil 1 fully ATF in there and I changed it to RedLine hightemp fully ATF now. Can't really tell any difference from the shifting...
except one thing - when the car was on the down-hill, the first to second gear is quieter and more gentle. Is it good or bad?