There's a 10mm plug underneath the plastic master cylinder reservoir that's on the Transmission, it's exactly the same size as the drain plug, I advise you use a Hex bit and Ratchet wrench when losening, it's a knuckle buster be careful not to brake the wire harness clipped right about on top of the plug, if you can remove the harness carefully and set it aside until your completely done, good luck! Thanks