So I'm planning on doing my first drain and refill tomorrow and was wondering what automatic transmission fluid is the best. I went to my local auto parts store and asked the guy what I should get and he just told me to get some "DEX/MERC" stuff. The brand is "Parts Master" and it says to use where DEXRON III and DEXRON IIE are called for.
What my question is is whether or not I should use this stuff, or return it and invest in something else? The reason I ask is because my tranny doesn't really shift well (it slips sometimes while shifting) and if I'm going to do this I want to do it right.
Any suggestions would be awesome.