[Accelo]

Good move on the dipstick replacement.
I typically jack the rear wheels off the ground and with USA made jack stands. Clean everything up then I would run the motor and look for leaks with it running.
Well it was easier as I had a lift with a internal jack but you get the point.
Appears the leak is large enough to ID that way.
If nothing leaks shut it down and keep looking as the converter may be draining back and raising the oil level. Check the oil after setting over night to confirm.
A lot of things can go wrong. Lots of moving part and hot oil.
"Periculo tuo". Just because I did it I am not recommending you do it.
If it is the pump washers, the transmission will have to come out to fix the leak.
Confirm they are tight before pulling it.
Cheers