I had to do a CV Boot replacement right before I got deployed for the war, which was back in February. In my case I mistakenly put the dust cover on backwards. There was a considerable spot of oil on the ground the next morning. So that day I took the axle off again and installed the dust cover the correct way. After that there was a little bit of gear oil around the tulip housing, but nothing hit the ground. I wasn't really given the chance to engage the front diff. and see if anymore would seep out.