Does anyone know the part number for the little metal cylinder which joins the automatic gear selector to the switch on the gearbox? Wear can be a cause of an inability to select Park.

FRC7630

And get the arm too. That's FTC1816

http://new.lrcat.com/#!/1234/91427/91612/7248/91660

Did mine last year. Got them direct from LR parts dept at local dealer. They're not expensive.

Perfect. Thank you very much.