Tried spark plugs, did not work
changed throttle body improvement but no fix
change MAS but no use
finally took to dealer paid diagnostics and they said it is Torque Converter. remember at this point there are no codes in the transmission or engine.
Changed the transmission fluid first with Lycos add-in work for a day.
In 2 weeks drained and fill up again the transmission fluid with slip guard from Amazon.
Improved but not completely fixed.
It is a big cost, scheduling to do that job to change the torque converter.