Bart,

Mine hasn't leaked but since I just completed my diff drop I kinda know what's going on in there. If you are going to do the diff drop then you'll be removing the seal anyway. This would be the time to replace the CV boots as well since you'll be 97.3% of the way there anyway.

Have you looked at StarChild's instructions for installing the Darlington diff drop brackets? I have it in pdf if you want me to send it to you. You can see the seal in the third picture in those instructions.

I didn't replace my seal (StarChild indicated this was OK so I took the gamble). I just happen to have 2 spares from the axle I got from the boneyard if you need them tho.

If you can live with the leak until you are ready to do the diff drop, I would recommend that you do so. You'll have the axle broken down as far as you'll ever take it during that process so just wait till then to perform any more diagnostics.