Zn and P in ATF's

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What kind of Zn/P package do ATF's use? Not ZDDP looking at VOA. Most atf's have 250-500 ppm P, but next to no Zn. Also what was Honda doing with this in Z1? 350-450 ppm Zn, but not almost no P.
 
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ATF's use mostly a sulfur/phosphorus AW package. The zinc is usually a zinc ester and is used as a secondary oxidation and metal inhibitor.

Since Honda's tranny's are hydraulically asssited manual transmissions, who knows.
 
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