I did this exact repair on my '03 Jetta last fall. I removed the axle, but not the transmission. Suggestion: The right flange seal sits in a metal cup (flange). you can buy just the seal, or a seal and cup set. Unless the cup/flange is damaged, you can replace just the seal, which is a LOT easier. The cup is difficult to remove; I used a cold chisel and 3# sledge to drive in one side until it collapsed and was loose enough to remove -- all while being ultra careful not to nick the aluminum transmission housing.