Check transmission fluid level.
U must use proper methods {procedures} when checking the fluid level especially for auto transmission..
i.e. drive the vehicle for at least 5-10 miles.
before U stop the car shift the gear manual thru all gear detents { put gear in R N D 1 2 3 etc. }
Then in Park , don't stop the engine / Now open the hood & Pull the transmission. level dipstick check the fluid is between low { cold } & full { hot } marks.
don't over fill & don't keep it below low { ADD } mark.
both extreme hurt the transmission.
Hope it helps.
Best regards;
ARAB Expert.