Ye olde booke of RAVE tells me that I should be feeding Dexron 3 ATF into my ZFHP22 transmission. OK, fine. Where are you guys finding this stuff for sale? All I can track down is Dex/Merc, or Dex 3 at high prices. Is Dex/Merc suitable for my transmission or should I absolutely, positively, only use Dex 3 regardless of cost?