I have a 66 galaxie 500. Haven't had it long. It needs a quart of transmission fluid. (It doesn't slip..tranny seems to be fine....only a surge....it's an automatic) I'm not 100% sure type f is in there however there is indication from a service sheet in glove compartment that a quart of type f was added before. What happens if there is type f in there and some other type (like mercon)?
On another note, the car has a pretty pronounced surge. I checked the distributor, timing,sparks etc. and all was fine. I'm thinking carburetor but I was under the impression when I "acquired" the vehicle that a carb. rebuild had just been done.