Using synthetic tranny fluid and getting axle seep

[luvs2drive]

I opted to try the Amsoil MTG 75W90 in my 05 Corolla 5 speed during the winter and it seemed to work well. My only issue now is that there seems to be a small seal leak on the passenger side axle at the tranny case. I've just put Redline MT-90 in there in the hopes that it will stop.
Anyone else have similar issues?