Can I use dexron/mercon trans fluid in a 1955 Ford? Calls for type F.
Apparently NOT. Seems the Fordomatic used bronze clutches. Anyone please correct me if this is wrong information.
From the Car Tech site:
Mercon —introduced in 1987 and similar to Dexron II. Ford ceased licensing Mercon in 2007 and now recommends Mercon V for all transmissions that previously used Mercon. Mercon is a suitable replacement for Type H and Type CJ fluid, but not for Type F.
Note: “but NOT for type F”
Type F is still widely available. Check any auto parts store or Walmart.
Early Ford automatic transmissions used fluid with a very low lubricity. The clutches and bands have very very little friction material on them and cannot stand any slippage at all. GM and Chrysler transmission of the period have much more friction material on their bands and clutches and can therefore tolerate a little slippage. That’s not to say they slip much, they just engage a little slower to make the shifts less harsh. Ford transmissions of the time shift much harder then the others.
If you use a fluid with too much lubricity you’ll shorten the life of all the friction materials in the transmission.
I know Mobil and Valvoline have type F trans fluid.