Originally Posted by Kestas
I don't like the kits. For the one I bought they use pipe thread and o-ring for sealing. The o-ring gets horribly mushed.
Lucky for me I have a box full of drain plugs with the rubber seal integrated into it. (They were test parts tossed after evaluation.) I also have a bunch of matching nuts. After drilling the hole in the pan I braze a nut on the hole for my drain setup.
If the DIYer has access to brazing, all they have to do is buy one of these drain plugs and braze the proper nut onto the hole for a robust drain plug - better than the kit.
Easy enough to buy a brass 3/8 female pipe coupler, drill hole thru pan side and braze it into the steel pan or even solder it on. Either make hole big enough to pass through the entire diameter of the female pipe fitting or just surface braze it. Then use NPT pipe plug with teflon tape to seal it.
The brass coupling could be face brazed on the outside of the side of the pan, so nothing would interfere with anything on the inside of the trans.
I would NOT stick this thing on the bottom of the pan.