[fredjacksonsan]

I don't know that a bad torque converter would cause a gush of fluid.

Since it was fine before you repaired the dipstick leak, it's time to go back and check your work. You may have dropped or dripped something into the transmission.

How is your fluid level, did you check it?

At this point for myself, I'd be dropping the transmission pan and inspecting everything in there. It could be something in the valve body also; if some sealant got in there and floated around to the wrong place it could cause the fluid to be misdirected.