if its a loose rock then its goosed, if you have to put a bit of effort in its juts gone soft so tiger seal up the gaps will extend its life a bit and make it tight.
I have to say sometimes a dodgy dog bone is nice, the grey 1.2 my mums using (how she hates clios lol) I stuck a new dogbone on it and now you can't get reverse or 1st cleanly.