Got a problem with my gearbox (I think) slight humming/vibration on overrun.
It is not the diff or propshaft so the only other thing I think that it can be is the bearings on the output shaft as the noise travels along the prop.
Does anyone know how easy these bearings are to change?
and
Does anyone know the bearing codes?

I have done everything possible to try to locate the source of the noise but as the noise travels it is very difficult.