Well changed box fluid other day & didn\'t make any notable difference to the noise & took it up to Pip V early in the day so it\'s have a chance to cool down sufficiently to make the full noise & sure enough it did & the verdict is that it\'s the gearbox namely one of the bearings but will need to strip it to get to that stage anyhow....
Anyone any thoughts on best plans as to getting hold of another box to replace it then get this rebuilt etc or just redo this one or what doesn\'t sound a cunning plan as it sounds like it would cost a LOT more when it goes tits up is to wait till it dies taking out a few other essential (AKA dear) bits? Although it did survive yesterdays runway abuse at least better than the tyres

lol...
Any thoughts or spare gearboxes lying around?
Si