jturbo

hi has any body found any thing that will quieten a gear box down? mines makes a whirr and gets as the car speeds up, and before you say wheel bearing its not! it think it could be a worn fron diff, its had this ever sinse ive had it and the bloke i got it from said it had done it sinse he had it as well, its getting on my +++++ now so was wounding if any body had had any luck with theres if your had the same trouble, its not a chatter or a rattle its just a weird noise, any advice would be greatfull thanks