So after talking with the service manager he said since I didnt buy the parts from him he couldnt warranty it. So I pulled it into the garage and jacked it up pulled the axle out and looked at the seal. Nothing looked wrong with it, no tears no defects, the seal looked perfect. the rear caliper dust sheild has a little lip at the bottom and caught some gear oil...the oil was clean, new, fresh oil - golden in color. The fluid I drained out of the pig looked like black liquid metal and was almost 2qts. I hope the muffler shop didnt squirt gear oil on it to make a quick buck but thats what it was looking like. The boss said we can fix that for $165 in labor and I should have that fixed asap. I told him the rearend was completly rebuilt 4k miles ago by Ford, he didnt say a word. The ring gear shows shiny metal the full length & width of the front and back of the teeth -I think thats a good wear pattern. I cleaned up the wheel and the areas that had gear oil and slapped in a new seal I bought from Rowe today just to be on the safe side.