about 2 and a half weeks ago i flushed out the trans pan of my 97 grand am. the car is spec'd for dex 3 but i had 3 bottles of Amsoil atf lying around, so i figured i'd buy a couple more and refill with that. the old fluid wasn't completely black, but it still looked pretty nasty. i then refilled with Amsoil atf (i didn't replace the old filter by the way either). and what a difference! i waited some time to post this because sometimes the effects of new fluids aren't noticed immediately. but it seems that every day since then the tranny shifts much smoother, both in upshifting and downshifting. i highly recommend this stuff
