I have a '99 ES300 with about 51k miles on it. I have been gradually doing total fluid (i.e., cooling, tranny, brake) changes since 50k with the thinking that by 60k (when they're supposed to be done), I'll have finished all the fluids.
My particular issue is with the transmission fluid. My Owner's Manual clearly states "DII or Dexron III." So I purchased Dexron III from the dealer. After pulling the plug and draining all the fluid, I removed the dipstick and it has "Use ATF T-IV" on the top cap and along the side of the dipstick. Since I only had Dexron III at the time, this is what I used.
Will this cause a problem? Should I drain and refill with T-IV? The best info I can find is that ATF T-IV is an upgrade to Dexron III, but if the tranny requires ATF-T-IV, Dexron III may create problems. I'm confused.