My 2007 Mazda5 2.0 Sport is experiencing a vibration through the steering wheel and the body of the car. The problem is most noticeable when accelerating between 60-70mph. The problem started after I had some work done on the nearside driveshaft – there was perhaps a slight vibration before the work, but nothing like it is now. The car failed the MOT due to the outer CV boot being split and, when it went in for repair, the garage found the inner joint was corroded and required replacement. There is now what looks like a rubber sleeve fixed to the driveshaft with cable ties, which I presume is a balance weight that was removed in order to replace the gaiter/cv joint and was put back in the wrong place.
I have had all four wheels balanced and also had a full four-wheel alignment check and adjustment. Do you know if it is possible to have the driveshaft properly balanced while it is on the car and, if so, can you advise me of any companies in or near Kent who could do this work? If not, is it possible to have the shaft removed, balanced and replaced somewhere locally? A last resort would be to replace the entire driveshaft – would that need to be a manufacturer’s original part to guarantee good balance or would an aftermarket item be fine? Tim Collins From your description and the fact that the vibration started after the remedial work for the MOT, it does sound as though the balance of the driveshaft is the problem.
Cable ties are not really adequate to ensure that the balance weight does not move on the shaft and I would replace these with wormdrive clips.
I know of no company that can balance the shaft on the vehicle. I would first try to adjust the balance weight – it’s less likely to have been put in the wrong position than it is to have been rotated incorrectly. By marking the shaft and the weight, it should be possible to rotate it 90° at a time, then road-test the vehicle to assess the effect. If this reduces the vibration, further fine-tuning by rotating 10° or so at a time may alleviate the problem. The other option would be a replacement shaft, but, as you have already paid out for a replacement joint, this should not really be necessary.
The driveshaft showing the centre balance weight.