Right now I have Type "F" in my Fordo.I am going to drop the pan and check for plugged filter as I am having trouble with no engagement in any gear when cold.Its fine once it warms up.Should I drain the Convertor and let everything drain for a couple of days and than refill with Dextron 2 which I believe is what replaces original Type"A".Or just refill with Type "F".?