D2 Gearbox Oil Change

[notorious]

Originally Posted by sarg

my experience of doing this on a D2 is that you need roughly TWICE the capacity to flush out the old fluid properly as you will lose some of the new fluid flushing out the old - it's impossible to only flush out old fluid, so I'd say you need to buy double the capacity

I'm planning oil change on D2 and I wonder how much fluid I need. I purchased 10 liters. I understand for full fill aprox. 9.8 ltr. is required, whereas geabox is sump capacity approx. 3.5 to 4 ltr, so the rest of fluid is in the 'system' -- not in the sump. Now how do I fully drain fluid from the system if I want full flush? I never done this before and I have only read this article: http://www.audipages.com/Tech_Articl...servicing.html

Or do you mean I need 20 liters (TWICE the capacity) to to flush out the old fluid properly?