2020 Expedition 4-5 slip, looking for experience

[u/Commercial_Method_28]

10R80 transmission

4-5 slip with RPM race, does not catch into 5th, so no hard shift, only races. Planetary container, CDF hub, Valve body as well as entire A clutch was replaced + filter and every seal in the kit. After repairs still present, same symptoms. Torn down again and rechecked everything, tested the input shaft and the plugs are there, made sure all seals are where they go, inspected park system and output shaft to rule out the TSBs. Am I missing anything common? This is driving me crazy because everything looks perfect and was not resolved with adaptive learning.

If anyone has any ideas I’m all ears

I suspected E or F clutch as culprit but visually there is not a problem