Evening,

My car has recently developed a rather interesting problem. I am more inclined to believe it is the diff rather than the gearbox but i shall run the symptoms past you to see what you think.

Between the speeds of 46-50mph i have an odd whining sound. It only happens between these speeds and at no other time. It also happens, at any revs in any gear which is why i believe it to be the diff and not the box, as it is the only part that runs at road speed not revs.

The only thing is, the noise goes away when the clutch is dipped- would this still be consistent with a diff problem?

Any other ideas would be welcome, or more specific diagnoses would be fantastic. I still have 2.5 months warranty remaining on the car, so i would like to get the problem sorted ASAP as it clearly isnt a wear and tear issue

Thanks very much