If you replace the cylinder, you could have a problem I will explain. Many years ago mine was replaced (supposedly with the factory original) and my slide would not fully retract in by about 1/4" or so. 98 Patriot 37' Ticonderoga.
The crew at "Bend Equipment" who were prior workers on the Beaver factory floor knew exactly what to do. They extended the slide, dropped the yoke end of the cylinder, removed the yoke piece, shortened it 1/4" and it has been perfect since. The bottom line is that the cylinder was a bit too long.
Larry Fritz
Adams, NE