The Acura TL transmission holds about 7 quarts of fluid, when you drain it only about three quarts will drain out, to really get a fluid change you need to drain three quarts, re-fill it, drive the car for about ten minutes,cycling through all the gears, come back, drain three quarts, re-fill it, drive the car for about ten minutes, come back, drain three quarts, re-fill it, and then it will be about 95% changed. I doubt any dealer would actually go through the whole process.NEVER EVER have the TL transmission power flushed, it will cause more problems than the transmission ever had.