Transmission fluid has always been a key component of the automatic transmission, however, with today’s complexities it has never been more important. Virtually every transmission family uses a specific elixir containing a different additive package. Even the color of certain fluids has changed. Using the wrong ATF can result in a variety of drivability and durability issues. Transmission failure could be blamed on items incorrectly due to using the wrong fluid. It is imperative that the right fluid be used.