Power steering fluid vs. tranny fluid

[Clarko]

Dexron in a Ford made the seals soft and in the Automatic made them too slippery. Really slippery. Bands and clutch packs in the C series, FMX and the AO4D would slip with Dexron if it was not mixed with Type - F. Type - F was death to standard build Turbo 350s and 400s. Type - F was built stiffer for the Ford trannies' softer bands and clutches. GMs were built the other way. A racing TH 400 with B&M parts was required to use B&M fluid. A blue version of Type - F.

Ok well, ALL Ford Transmissions PRE 1983 take type F!
ALL Ford Transmissions 1983-later take Dexron III aka Mercon!
At least through the early 90s, Ford Powersteering takes Type F.
The AOD has always taken Dexron.

[DuckRyder]

On the PS.

Use ONLY what is recommended by the manufacturer.

On the Transmission, You can use Type F in a trans calling for DEXRONII, but not DEXRONII in an original transmission calling for Type F.

However, all new fibers, bands and seals that I am aware of for rebuilding older Ford transmissions arDEXRONon compatable.

The main difference in Type F and DEXRONII is the way it reacts to friction. This is why Type F will cause a firmer shift in a DEXRONII transmission.