Toyota Hilux Gearbox Problems

Hi my daughter has a toyota lucida 1993 2'2 auto,the overdrive has stopped working,it used to light up on the dash to say it was off,now not lighting up,and its not working,any ideas please thanks tony

Auto gear box in my 2020 hilux Hard to shift from park and delay in changing gears domes times takes a thew seconds to redgister what gear it’s in and makes a loud bang in the gear box