Look at the valve body - corner by the spring retainer bracket. There is a small long skinny spring next to the reg valve. That’s the TCCV and spring. That’s your likely culprit. That valve should be all the way in it’s bore. And it should fall out once that bracket is removed.
Do you have a pic of the TCCV and spring location? I have a transmission with the same problem & thought I may mess with it over the winter. Thanks.
