Thanks to all. I too would rather use a gasket if possible. I really haven't had time to see if any were available yet. Thanks 3B for the numbers. I used the black silicone in the past with good results. I figured since the rear axle isn't pressurized or heated, it shouldn't matter, but I wanted to ask the tribal elders first. The gaskets on the outside caps are gonna be fun to cut if I decide to make my own!
