My transmission is leaking from a tiny crack that was caused by running over some debris in the middle of a bridge T_T

I took a look at the crack, it's on the outside of the case. It's not even a crack, it's so tiny, but there is a tiny 1/2 inch dent that is about 1-2cm inch deep. I don't see any visible crack line, don't see a whole or anything. It's pretty much hair line.

But it's leaking transmission fluid.

Is welding the only way? Can't I find a temporary solution like JB weld?

I have a honda 2000 accord ex.