Hi guys ..Recently my car is generating some funny grooming sound (low frequency) whenever the car is traveling from 60-80km/h but it will be quieter whenever it reach 90 and above. Its seems like there are something vibrating at the undercarriage but the body of the car is still steady. Sent it for a check at the workshop and they suspect that this could because by the long shaft. Do you guys have any similar experience? Not sure whether this could be the issue with the tyre? especially when the tyre is pretty old (but yet the thread is pretty deep). If worst case this is the long shaft issue, is it expensive? Thanks and looking forward to hear from you all soon.Regards,JS