No no no no no no no. You can't modify liquid like that for the A604. Even that is enough to do harm. Has to be 7176/atf +3 (or 4?). --- Johnemory@xxxxxxx wrote: > Maybe I've missed something here, but did you > recently change the fluid in > your A604? And did you put tranny fluid in it? If > you did, naughty, > naughty. The A604 uses Chrysler 7176 friction > modified fluid, and will put > up a fuss if it isn't fed properly. A good > alternative is to use regular > fluid and include a bottle of a friction modifying > additive available from > your local parts house. LubeGuard is one of the > most recognizable, but other > companies also make a similar product which works > just as well. Hard > shifting is one of the symptoms of incorrect fluid > in this unit, as is > intermittent limp mode operation. > > Now, if this has alread been addressed, forgive me. > I've been distracted > this past week from my usual nightly ritual of OIC > reading, and have skimmed > over all but things relating to '55 and '56 models. > > John Emory > Santa Fe, New Mexico > '56 4D S'hampton > >