Can someone tell me where the pressure relief valve on this is? I can't find it. I'm losing oil out the left side seal and I want to check this first. If this ain't the culprit can someone point me to a good btdt on changing the seals. >From the look of it this could be a major job. Who was that who had a rear diff just sitting on the floor? Geez, I'm going too fast here. Appreciate any help. Geo