Over time, your slip yoke eliminator yoke can wear out or break. Now offered as a separate component, this heavy duty slip yoke eliminator kit converts your transfer case from slip yoke to a fixed yoke for improved off-road durability and performance.. This NP231 slip yoke eliminator (SYE) kit from Rugged Ridge fits 88-95 Jeep Wrangler YJ and 97-06 TJ Wrangler.