This past weekend while changing out the transmission fluid, I installed a Fumoto drain valve on my tranny pan. Has anyone else done this?
I bought the F107N from Greg at Lubrication Specialist a couple weeks ago. The threads on the F107 are 12mm-1.75. I borrowed a metric tap set from a friend. This was somewhat unnecessary because the pan is so thin- an appropriately-sized drill bit would have worked fine.
I tapped the hole, test fit the threads, and made sure everything was good and clean. Then I applied some red threadlock ($5 @ Advance Auto Parts) and threaded it together. If I had located the hole further away from the corner of the pan, that might have been enough, but since I wanted the drain point as low as possible, there wasn't enough flat surface and some JB Weld was necessary. I put a ring of it around the threads inside the pan and let it cure overnight.
In hindsight, I wish I'd put a nut on the inside and then coated that with JB Weld. I still plan on putting some JB Weld on the outside of the pan, just for safe measure.