Park doesn't work :(
 

My friend and I are working on my 89 Camaro RS and for some reason we can't figure out why it wont go into park. It is an automatic transmission. You can put the shifter into park but it stays in reverse. And you can shut it off in park also. The way we keep it from moving is to have the E-Brake pulled up when it's off. Any ideas what's wrong?

tranny shift cable..