Thanks all, much appreciated. The problem has been there in varying degrees since I have had the coupe. It is the usual 65mph resonance. Sometimes it seemed to be very little, other times significant, but never gone. But it has not been the priority issue. I am now going though the process of diagnosing the problem and have had the wheels very closely balanced and tried changing them around, check tightened all suspension bolts, serviced the brakes and finally had a brainwave. At one point I found the outer offside (long) shaft ball joint gaiter clip undone. Securing it again reduced the vibs.
I put the car on a solid chassis ramp and ran it up. Looking at the rotating components that shaft is the only one looks as if it is vibrating. (i.e. has a fuzzy outline with 65mph on the speedo, more solid when lower speed and no vibs. felt) But the offside wheel is responding. (changing the wheel made no difference - unless there are two wheels that balance fine, but don't run true on the hub!) Nearside looks solid and the wheel and tyre solid, too. Then tried it without wheels at all. There is still a buzz when the wheels are removed but obviously not the same vibration. Hence the idea to try a DIY balance of the shaft. So if I succeeded is there a possibility I would have problems with MOT or not in your opinion? I suppose wheel balancing on the car might still solve it even if it is the drive shaft. But it would not be the best solution. If I can balance shaft that would prove the problems source and I might still change the shaft. Or maybe it is the gearbox output Jim (!) Derek On 9 Oct 2013, at 09:50, <[email protected]> <[email protected]> wrote: > I had a similar problem on a 2+2 a few years ago. > Checked everything and had the wheels balanced off the car - couldn't solve > the problem. > Ended up having finding a garage that could balance the wheels in situ (on > the car). > That solved the problem. > > AJ > > -----Original Message----- From: Jim Hearne > Sent: Wednesday, October 9, 2013 9:26 AM > To: [email protected] > Subject: Re: [Quantum Owners] Balancing a drive shaft > > I have to admit to having changed a gearbox on a car to fix a vibration > which turned out to be the front tyres........ > > Jim > > > -----Original Message----- From: Nigel Plant > Sent: Tuesday, October 08, 2013 10:52 PM > To: [email protected] > Subject: Re: [Quantum Owners] Balancing a drive shaft > > Agree with Jim. Not sure what points to the drive shaft, but the other > potential one, which I've had problems with in the past is tyre faults. Try > switching wheels front to back, one at a time. > > -- > -- > You received this message because you are subscribed to the Google Groups > "Quantum Owners Group" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/quantumowners?hl=en > > IMPORTANT NOTE: All information presented herewith is provided on an "As Is" > basis, without warranty or the implication thereof. 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Neither the Quantum > Owners Club nor the individuals associated with the Quantum Owners Club or in > the preparation of the above information shall have any liability to any > person or entity with respect to liability, loss, or damage caused or alleged > to be caused directly or indirectly by the instructions contained within this > or related message(s). > --- You received this message because you are subscribed to the Google Groups > "Quantum Owners Group" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/groups/opt_out. -- -- You received this message because you are subscribed to the Google Groups "Quantum Owners Group" group. 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