Have a 92 F150 2wd Supercab w/5.8L auto trans. When the truck shifts into 2nd gear it makes a ziiiiiiinnng sound(no other way to explain it sorry). Trans shifts smooth in all gears just trying to determine the nature of the noise. It doesn't affect the trucks performance in anyway. Thanks,

 

is it like a whine perhaps? the pump might be on it's last leg. only way to fix that is a rebuild.