The Zeiger steering had always been rock solid until a couple weeks ago when I did my pre-boating check and found about an inch of play in the steering. The rams would move in and out allowing the play. With some help I bled the system and found a little air but wasn't able to get it rock solid. I went boating anyway with 1/4 inch of play in steering. The drive seemed about the same after pulling from the water. Now, about a week later, I have a good full inch of play in the steering and the rams are moving in and out like there is air in it. The fluid never got low. Any ideas?