I am trying to remove the pivot housing on my cobra... manual says to loosen shift cable nut and pull cable out of the housing. I have playing with this for hours. I "loosened" the nut, the cable is still tight in the pivot housing. When I continue to loosen the nut, the nut just spins back to where I started. I have disconnected the cable at the engine, removed the 2 metal nuts and slid the plastic cover off. Whats the deal?