Re: Synthetic ATF-Waste of money?
Hi XPlumber. Regular Mercon has been out of production and off the shelves for several years now, and has been replaced by Mercon V which is synthetic.
I recommend just dropping the pan and filter change instead of doing a flush via the lines. Being its been driven gently, I think that would be sufficient not to mention cheaper and safer. To flush using the lines you have to add back as you pump out being careful not to let it pump dry.
Be sure to use Mercon V and not a universal type of fluid that claims to be suitable for any transmission. You'll probably have to get it at your local auto parts store.