HI all, long time no see... My astra has had a few new things such as radiator, alternator(got refurbed) and most recently clutch. Oh yes before all that I had a new speedo cable - this may be my problem i fear. When below 20mph i get a buzzing sound which sounds liek there is a fly trapped behing the dash. lol. Do you think it could be my speedo cable at low speeds as it doesnt seem too acurate below 20 either. Cheers all