What I found is that the seals inside for the Parking brake are shot and all the oil is shooting past them into the differential. I capped the left side (this was the side I noticed was leaking a while ago from the cooling seals) when i did this the pressure went to 250 PSI and i got almost 15 gal of oil from the diff. It doesn't need a brake job, but rather a reseal.

Thanks for all your help! If I can be of service to anyone in the future please let me know.