my bronco has a tranny leak, i have to add a pint every now and then. i dont drive it every day so i havent really worried about it. i was told to use type f fluid, then i read the other day in a manual to use dexron//mercon. is the type f going to cause any problems? ive noticed it doesnt downshift into 2nd when you slow down to make a turn. you have to manually drop it to 2nd. it will downshift to 1st if you come to a complete stop. should i drain it and refill it with dexron//mercon?