Re: Trans Fluid for a twin ultramatic? Power Steering fill mark and fluid?

Posted by PackardV8 On 2011/9/22 23:18:56

WE are analyzing 50 year old transmissions. What are all of the possibilities???
1. An OEM unmolested trans.
2. A rebuilt trans using genuine PMCC parts or approved parts (probably rebuilt sometime in the 1958 to 1975 time range).
3. a rebuild using modern materials from a single source.
4. a rebuild using modern materials from a variety of sources or parts that fit from some other manufacturer of transmission.

So the type of fluid required mite depend on which catageory listed above decribes any selected trans.

when history of trans is unkown then what ATF is the best choice as a kind of 'one size fits all' fluid????