Automatic Transmission makes a bang noise on 2006 Hyundai Tiburon

Everytime drive slow when it changes from second to therd it makes bang sound and the car shakes but when i drive fast it changes well and sometimes i dont have any problem i check the fluid level it's ok and i scan the car it said speed sensor selenoide and air mass flow sensor like if there wher damege please help.
Oh, the shiftronic doesent work

1 answer
take to tranny shop and have them diag the problem