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I see a difference between the ATF that the factory recommended in the sixties/seventies and the ATF+4 of today. "Slippery" fluid defeats the purpose of the synchro rings.

Even though some current standard transmissions use +4 from the factory they have different (composite?) synchros than the 833.



there is even a difference between the recommended fill of Dexron to the currently available Dexron/Mercron III , I wouldn't even think of using that +3 or +4 fluid.

John is also correct late model manual transmissions thaat call for ATF don't have BRASS syncro stop rings .