A tip for draining the oil.
I found I can get a full 5 litres out in one drain if you can have the front of the car facing downhill after it is up on ramps.
I have a sloping driveway so it was only a matter of reversing it up the driveaway and the running it up onto the ramps.
In this position my driveway was steep enough for the front of the car to be lower than the rear.
This helps getting more oil out of the tranny because the drain plug is at the front of the tranny.
I also got some more from the converter by reinstalling the drain plug (finger tight) after draining and then running the engine for around 10 seconds and then taking out the drain plug again. I did this twice and got a reasonable amount of extra oil out.
I am using Valvoline oil which is available in 5 litre containers and when I measured what I had drained out it completely filled a 5 litre container making it really easy to refill by simply putting the whole container of new oil back in.
Having now changed out 10 litres in 2 changes and replacing the filter, I don't think I will proceed with a 3rd change as the car showed a significant improvement after the first change anyway with the shuddering completely gone.

Just a question Fredoops seeing as how you have pioneered this thread, why have the Mods not made this a sticky?
Cheers
Gary