Inspection of a 904 torqueflite

You used round stock and the welder just filled in the base and built it out?

Did you drill all the way through 1/8 npt. My biggest problem was the angle on this and the plug just threaded all the way through the hole because it had nothing to seat against.

I was thinking maybe do a 1/4” diameter all the way through to the valve body......and then drill a size or two bigger for the plug....just not going very deep with it. Maybe 3/4” deep or less into the long drilled hole. so the plug would seat. Using a 1/8 pipe thread which has an outside diameter of closer to 1/2” (.40). It looks like that’s what you did and a&a did as well.

Your plug is sitting flush with the surface.

What would it take to trash the case to the point it’s ruined in this particular area?

I looked at 3/4 x 1” bar stock 6061 aluminum on eBay to start with, but I’m not around the transmission right now. Just looking at the pictures. The welder might even have this bar stock laying around and have an idea of what they want to do.