Trans pan has a pin hole in it.

Jb weld should be fine, as dodgefreak said, clean it with brake cleaner, jb weld the inside and the outside and it should hold the fluid.
Thank you :colors:, This is what I am going to do so I can test my radiator for leaks so I can winterize it today, Thank you :glasses7:

Either have it welded of JB weld would be fine. Either way it has to be off the car and oil free.
I have it out and oil free and I will scuff it inside and out with some 220 sand paper and NOT weld it.
If it isn't a rust problem and you already have it off and clean I myself wouldn't think twice about brazing or wire feed welding the small hole closed after fixing I would check it again to make sure no drips and call it a day but that's just me. Unless someone has one laying around for cheap then I would buy that 1.
I was concerned about the wire welding also :glasses7:, and new if I did it would need to be J.B welded any way to make sure of it nor leaking :D