Your description indicates the transmission is overfilled causing the air bubbles which causes the trans pump to loose pressure. Fluid level should be checked in park with engine running. If it is overfilled you need to remove some fluid with a suction device (available at most auto parts stores) and it should be fine.
Sounds like a radiator cooling problem !
Too much ATF in the transmission will cause foaming and bad shifting. You been adding ATF? You need to check the tranny dipstick with the motor running!
How hot is hot on the temperature gauge on the dash? Do you need to change what?
When my car is hot my transmition gets bouncy and not normal shifting and when I check my fluid it's all bubbly like air bubbles in the fluid ??? Do I need a change ?
