The Ford Falcon BA doesn't have a dipstick to check the transmission fluid level like older cars. The transmission fluid level is checked by a mechanic using specialized equipment that measures the fluid level while the transmission is operating at the correct temperature. There's no DIY method for accurately checking the level.
If you suspect a problem with your transmission fluid (low level, leaks, burnt smell, rough shifting), you must take your Falcon BA to a qualified mechanic or transmission specialist for diagnosis and servicing. Attempting to check the fluid yourself will not be possible and could lead to further damage.