I bought a used 2009 a few weeks ago. 700+ hrs on the meter. Replaced some tires, did an oil and filters change and fixed an exhaust shield rattle. Unit runs great, but I have distinct knock in the front left at slow speed. Since I can't duplicate the noise by bouncing the front end when parked, I'm ruling out suspension. I'm thinking CV joint? Any other ideas before I attempt to pull this thing apart?