Make sure your differential vent (on top of the pumpkin) is not clogged up. Heat from use will build up pressure which needs to release. Otherwise your seals pay the price and will be damaged and leak.
On a related note in case you damaged them or simply want to ensure no leaks from the axle housing coming from the pumpkin, I still have NOS seals which are part number G166-03-82860. These seals prevent leaks which would ultimately affect your brakes and outboard steering.
http://www.visualcollector.com/Tommy...TommyStuff.htm