Hi and thanks for using 2CarPros. Com.
I have to be honest. It sounds like the transmission filter is plugging. Think about it. At first it works. If there is a lot of dirt in the pan, it sucks it up and replugs the filter resulting in low pressure and lack of circulation. Hence, the fluid looks over full because it is no longer circulating. Then, you turn the engine off, the pump stops, and the dirt drops back into the pan until the cycle starts all over again.
That is the first thing I would suggest checking. I do not know if you need them, but here are the directions for replacing the filter.
PAN AND FILTER ASSEMBLY REMOVAL
Pan and Filter Assembly Removal
1. Remove the transmission oil pan screws (76).
2. Remove the transmission oil pan (75) and the transmission oil pan gasket (73).
3. Remove the transmission oil filter assembly (72).
4. The filter may help in diagnosis. Cut away the top portion of the plastic filter housing and remove. Inspect the filter for the presence of the following items which may indicate wear or corrosion:
Bronze slivers indicating bushing wear
5. Remove the oil filter seal (71).
OIL FILTER ASSEMBLY INSTALLATION
1. Lubricate the filter seal (71) with transmission fluid.
2. Use a socket the same size diameter as the filter seal (71) and install the seal.
3. Install the transmission oil filter assembly (72).
Let me know if this helps.
Images (Click to enlarge)
Saturday, November 17th, 2018 AT 9:13 PM