i have a 2005 rtv 900 that has a steering problem, for several months when traveling on a hard surface it would dart in one direction or another now the steering has completely went out. front end jacked up, wheels are solid, no play, steering cylinder is solid. wheels will turn, steering wheel will not. front wheels on ground, steering wheel will turn, wheels won't. all fluids full, bed raises up goes down \, problem seems to be in valve that steering wheel is connected to, anyone have any ideas