"ZF LifeguardFluid 9 was specially developed for use in ZF 8HP and 9HP automatic transmissions."
ZF has an obvious concern about needing to mix it, though...
"Automatic Transmission Fluid for ZF Automatic Passenger Car Transmissions (8HP and 9HP)
When changing the fluid, only the approved transmission fluid may be used for the fluid change, and it is also necessary to ensure that the transmission fluid change is carried out according to the relevant ZF provisions. Small container (up to 20 l) must be shaken vigorously for at least 15 s before removing the oil."
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