RS6 C8 2021 Gearbox oil change and sport dyff

[Adi]

Hi

I want change oil in whole drive system on my RS6 C8. What oil where to use ? Someone can help ?

Regarding to gearbox I need attached pic
mark 1 oil for front differential ?
mark 2 and mark 3 is it separate chamber?
mark 4 what kind oil I need to use ?

Thank you

[IanH755]

On previous ZF gearboxes the two diffs (1 and 4 in your image) use a single diff oil reservoir whilst the gearbox core (items 2 & 3) again uses its own centre reservoir.

As to the fluids themselves I've not seen a ZF 8HP gearbox myself so I can only go off what the general internet has said so take that into account -

Gearbox - ZF LifeGuard 8
Diff - 75W-90 but so many different types that picking one is almost impossible (with/without additives etc).

[pvrs6]

Did you found a service center in Europe to do it?

[JamesLawrance]

Hey Adi,

Please see the attached with the part numbers for various oils for the 8HP.
#2 in your picture is Lifeguard 8
#4 is viscous coupling. Very expensive oil ~£130+VAT per litre.

ETKA lists that the front diff on the gearbox is the same oil as the viscous coupling. But I'm certain it's a good quality 75w90 GL5 oil in the front diff. But make sure you use the proper oil in the rear viscous coupling! Takes about 1 litre