Ok so quick update, I've been to the scrappy today and it seems none of the micras have still got spring no9 on the diagram so I'll proceed without for now. What hasnt been solved however is the scraping noise.
I double checked the brakes weren't sticking and have had it out for a drive today and it seems the noise still happens even when coasting in 3rd, and you can change the tone of the noise above 50mph in neutral by moving the gearstick side to side across the gate. Weird eh. The tone also changes between acceleration and overrun.
I may drain the box down tomorrow, how much and of what viscosity oil would I need? Unless someone can tell me the box has had it and I may as well just chuck another one in and be done with it.
Oh, and I have double checked that nothing is physically touching any of the linkage or driveshaft area, it is all clear.
