If its the same thing that I had problems with you might be able to use a zip tie. My dust cover broke where it was supposed to be held at and I zip tied it. It moves a bit but its better than not having it at all.
Thanks Larry. that makes sense. so im guessing i can assume that if its still leaking its GOT TO BE the OIL SEAL. i for some reason thought the dust shield may have butted up and kept small amount of pressure on oil seal. guess im an idiot. i shall replace oil seal and get a piece of PVC pipe that fits it perfect so i can drive it onto the CV axle without bending. (thats why i originally had to change the dust cap. i accidentally bent it while tapping in the cv into the diff housing.)
OP, the same thing happened to me. I tried my Dad's pneumatic drill and still wouldn't budge. I ended up having the shop do the front diff because i wanted someone else accountable for any damage getting the thing out. They got it out without damage - they have their ways