[Dannyallen]

Hi guys, I'm looking for a bit of help or information on changing the oil in my auto gearbox. I've changed the oil today but when I drained the gearbox I only managed to get 3 liters of oil of it. I ran the engine whilst draining the gearbox to pump it through but that's all I could get out of it and it's my understanding that there should be 5.5 liters in there on my 2012 xc90. I haven't seen any leaks so I suppose I'm asking what might of happened to the other 2.5 liters? Any advice would be greatly appreciated.