rebuild C6

My C6 will need rebuilding soon.Have been told that with a full rebuild that I can go to a Mercon/Dextron type of tranny fluid even in an early Ford automatic tranny.If this is so,it will make things a bit easier for fluid as the type F and FA is at times a bit difficult.Which of the above types would be the best to use.Thanks in advance for any help.
Good luck.Have fun.Be safe.
Leo

 

I'm no expert, but I did rebuild a C4 once.
From what I've read, the material used on the clutch discs will determine which fluid to use.

Type F gives firmer shifts, Mercon gives smoother shifts.

 

Don't ask for Dextron. People will laugh. He's dead. DEXRON lives on. Ron

 

That is true if its a modern kit and not some old stock with the metallic clutches.

 

Did you post this on the Ford Six forum ? If so the same answer is I use Valvoline Dexron 111 in my C6 Auto.