I do not believe Dexron VI is a full synthetic. I am a solid believe in full synthetic transmission fluid. It helps reduce temps, lasts longer and provides better protection.
Now, that all said, I had never considered using a thicker fluid (more viscous) until I met Trannyman. I would have never done so out of fear the pump would not do well with it. But Trannyman I believe runs a bit thicker fluid (I will let him give the details if he so chooses) and his reputation speaks for itself. So in my mind, Im thinking, and Trannyman correct me if needed, that a slightly thicker full synthetic may be a good combo.
But again I know fluids, but trannyman knows trannys and he would be the better source of information in this case.
