I have finally had the chance to have a good look at the Rav4. It turned out to be the 2 x cables that run from the manual gearstick to the gearbox linkages. Im very surprised that I have not had anyone bar 1 person mention this problem as here in Australia it seems to be the number 1 problem with this model. The plastic sheath gets brittle and cracks which then in turn exposes the cable and frays it and thats when the problem arises. I have attached a pic of the 2 worn cables.
What I do need to find is these 2 parts. Here in Australia the part is very expensive. If anyone can help that would be appreciated.