According to my trusty Dodge Owners Manual, the fluid in my NV 5600 transmission is permanent. Well, I know this is BS, so, how much oil (fluid) does it hold? The book doesn't say. Also how much does the rear axle hold. Same as the old axles? I can't believe anyone would say that anything that spins and takes as much abuse as a transmission would have "permanent fluid" in it. I know someone here can answer these questions for me.