I own a 2000 pontiac sunfire 2.2 liter. i need to check the transmission fluid because it has always had a slight leak. there is no dipstick and i have been told by mutiple sources about the plug on the side of the transmission.i know that if you remove this plug, you are to wait until the fluid is level with the bottom of the hole. i am stil extremely confused as to what i am suposed to do. should the car be running with the oil hot? should it be in neutral or park? i should have mentioned that it is an automatic transmission. please help!!!!