Silicone the dipstick tube. Third time I've mentioned this in 7 days. I'm no transmission expert but my transmission expert is an expert. He says to silicone the O ring on the dipstick tube.
Not trying to be a smart a$$ but install with silicon lubricant or wipe silicon type sealer around the tube.
SN: if people just used the search feature as this has all been covered about as many times as “what tire / rim combo” fits a duster