my sister had a mark 1 and my dad as a company car a mark 4 or 5.
I seem to recall a story but 40 years on and I could be wrong.
My sister had a rattle in her MK1 and took the car to a garage, they diagnosed a duff gear box.
She came home and spoke to dad who went to take a look........... he shut the ash tray!
In 1st and 3rd the gear leaver could vibrate against the open ash tray
macafee2