I drained and refilled my rearend a few weeks ago and have driven about 50 miles. I checked the fluid today and was 3 pints short. I read somewhere on here that you should check it around this point after a refill, and I'm glad I did. There is no oil spot on my driveway and the pumpkin looks fairly clean - I can't spot a leak. I used the paper gasket that AZ sold me with no sealant.