You know what? I forgot about another car I had that developed a problem. I dropped the transmission to discover that the plate on the top where the shifter was had come loose. So I tightened the screws and put it together and it was fixed without spending a penny. It's only time and effort to take it apart and put it together. It may be a simple fix or not. It sounds to me like something it binding or just broke all together. Those are the easiest to see visually. I had a noise in the transmission of an old Mercedes and I asked my Dad and he told me, Son, if you take it apart you won't see what's making the noise. If it's not broke ..... don't fix it. Yours is broken and should be obvious what is wrong when you get it apart. Check you linkage first.

Les