IF you have more than 30k to 45k and have no idea when it was last "flushed" completely-then do the reverse flush. The less expensive version replaces 3 quarts of oil and nothing more than that. There is no flushing for the lower price. Most HOnda dealers charge in the $100 range for a full reverse flush using 7 quarts of Honda AT fluid. This is how I have cared for my 99 Prelude and you can see the difference watching the machine. Also-there are NO filters or screens in the SS gearbox so the only real way to do it right is to reverse flush.

Happy Luding

Someone buy my car!