Update on rear differential. I did some research and found that there is a vent on top of the differential that allows air to escape as the fluid warms and pressure buidls up. I checked the vent and found that it was blocked. I was abel to free it up and topped off the fluid. Has been fine ever since. I was luck in that the excess pressure only pushed fuid past the seals and did not permanently damge them. Hope this helps someone out.
