I work for an oil company and visit transmission rebuild places and they keep telling me the factory fluid is clear...LifeguardFluid 6 is a fully synthetic transmission fluid specially formulated for use in ZF six speed transmission units, it is yellow in colour and suitable for the following transmissions: 6HP19, 6HP19A, 6HP26, 6HP26A61 (Except Audi with W12 Engine), 6HP32, 6HP32A and 6HP26X. Available in the following quantities 1 Ltr Bottle 209 Ltr Drum....