I have a slow leak in the differential that is coming from a failed gasket or more likely from the breather valve in the rear cover plate. While I was wiping off some fluid today to try and determine where the leak was coming from I noticed that the breather is very lose where it attaches to the cover plate. I dont think there is a way to tighten the breather without taking off the cover and I am hesitant to run the car if a bolt comes loose on the inside of the differential. Before I make a huge mess and remove the cover plate I wanted to check to see if anyone has had such a problem and could offer up the simple solution. Thanks.