I thought ATF, particularly Dex/Merc IV, is loaded with dispersants?
A dispersant is there in ATF but in very low treatment levels since there are no combustion carbon deposits to disperse.
BTW, todays ATF's average as follows as chemistry has changed since that previous post:
Phosphorous - 0.3% AW additiveZinc - 0.015% secondary anti-oxidant as ZDDP
Nitrogen - 0.9% Mostly anti-oxidants and Friction Modification chemistry
Boron - 0.16% AW additive
Calcium - 0.1% Detergent, tbn base chemistry, and rust inhibitor
Magnesium - < 0.005% if anySulfur - < = 0.33% AW
Barium - Not Used anymore
Dye - 100 to 250 ppm any color these days but usually red analine dyeDispersant - Ashless succinimide dispersant (succinic ester-amide dispersant, phosphorylated and borated) ~ 300 ppm which is 1/10 that found in engine oils)
So as you can see, both detergent and dispersant levels are very low.