Ok so I thought I'd have a go at changing my transmission oil as it has never been done. Apparently it should hold 1.8ltr so dutifully purchased two litres and the 17mm hex driver. Sat vehicle level, opened up drain plug, left to drain whilst had a cuppa, returned to find it had stopped draining, measured out oil to find only had 750ml empty out? Thought no wonder gear change wasn't particularly smooth! Proceeded to fill with new oil expecting a lot more to go in than came out, but no most I could get in was the 750ml before it started running out of filling hole? So what did I do wrong? What happened to rest of the 1.8ltrs and why didn't it drain out? Will say this, so far gear change has been much smoother. Any pointers?