Oil for Ferret Fluid Coupling?

[LRDG]

Originally Posted by Chris Preston

Check out this link - scroll down to the bottom for the chart with the list of fluids, and a second diagram showing what goes where.

http://www.ferret-fv701.co.uk/useful_info.htm

Hope this helps.

Cheers,

Chris Preston,
Victoria, BC

Chris, That's the link that says I should be using ISO 10 or 15 viscosity grade oil in the fluid coupling, which is a very thin, quite specialized oil for high speed spindle bearings. It's MUCH thinner than the ATF that's in there now, which has 30 grade viscosity.

I did some more searching and the consensus, especially over on HVMF, is that OM-13 spec oil is indeed ISO 10 or 15 viscosity grade.

I suspect the heavier ATF is contributing to the quite high drag I get from the fluid coupling, especially when engaging 1st and 2nd gear at a standstill.

Anybody know how I can drain the fluid coupling without having to split the engine and gearbox?