It does sound like one or both of your shift linkage bushings has failed. They simply disintegrate, a very common problem. Unfortunately they didn't leave a lot of room to access the lever on the side of the trans, that contains one of the bushings. I generally lower the trans. mount support bracket and wedge a piece of wood between the trans. and the tunnel. If you warm the new bushings a little and use a long pair of needle nose pliers and a little white grease for lubrication, with a little patience you'll get the job done. I have seen cars that eventually have the shift linkage become disconnected and leave the car in what ever gear that its in. Good luck!