I had the same problem as this. Took years before someone mentioned it could be the wheels not been on be central. I had sierra wheels on but the centres where slightly different, so small you couldn't put a sleeve on. When I put steels on ran fine.
On Wednesday, October 9, 2013 10:49:39 PM UTC+1, trackerjack wrote: > Hi I have had a balance problem on my 2+2 and it too drove me nuts until I > realised that the wheels were centred by the studs alone and not by the > register in the middle. > Some new register sleeves (readily available cheap on the Bay) and > vibration > cured. > But never had a shaft out of balance. > ----- Original Message ----- > From: "Derek Clews" <[email protected] <javascript:>> > To: <[email protected] <javascript:>> > Sent: Wednesday, October 09, 2013 7:19 PM > Subject: Re: [Quantum Owners] Balancing a drive shaft > > > Well, I took it on as someone else's unfinished project which had not been > on the road with the current engine before and sat around for a few years. > For this phase its mainly bodywork. The idea is to glass in the old > sunroof > to solid again, new front with round driving lights and led lights, > internal > roof strengthening, bonnet work to suit the engine and a little > sympathetic > rear treatment. Then glass out full respray in Apache Bronze, replace > with > new glass front and rear. I will finish the interior trim myself. It's > already got the 2 litre CVH with aftermarket ECU and rolling road set up, > uprated brakes, lowered and renewed suspension plus large HiFi, central > locking and immobiliser and some recent interior re-trimming. It's now a > reliable car (which took some time), so I am making it better and more > comfortable. I am not sure a kit car is ever finished, but then it should > be close! > > Derek > > > On 9 Oct 2013, at 16:40, Susan and Martin Scott wrote: > > > Please reveal all - what are the improvements? > > Martin > > ----- Original Message ----- From: "Derek Clews" > > <[email protected]<javascript:>> > > > To: <[email protected] <javascript:>> > > Sent: Wednesday, October 09, 2013 4:04 PM > > Subject: Re: [Quantum Owners] Balancing a drive shaft > > > > > > Hi Jim, > > > > I think your last comment has got it. The loose gaiter flopped around > > being more out of balance but both gaiters secure they still move more > > each rotation compared to the other side. You cannot see any bend in > the > > shaft at low revs so I will go with the joint(s) on that side. > > > > In the meantime I have just managed to balance the vibration out with a > > bit of science and a bit of luck. Totally gone now. And that is with > the > > weight attached at the inboard end of the shaft. So supporting the idea > > it's not the hub or wheel. I think it's time for a new driveshaft. > Last > > one I did was a few years ago but I recall it was not a bad job, just > > heavy. Just a case of finding a replacement. But that will come later. > > The Coupe is going to be Eddie-ized at the weekend. Hopefully it will > be > > Super-Coupe in a months time! Onwards and upwards for the quality of > the > > car. (and the bills) > > > > Cheers > > > > Derek > > > > > > On 9 Oct 2013, at 12:35, Jim Hearne wrote: > > > >> It could be either the driveshaft is bent, or it could be wear in the > >> driveshaft joints themselves. > >> Do you get much backlash in the joints if you hold one half and try to > >> turn the other half ? > >> > >> I'm not sure if the MOT would say anything but I'd still be worried as > to > >> why it would need balancing, the only reason i can think of is it's > bent. > >> > >> Can you borrow a dial gauge to put up against the centre of the shaft > and > >> turn the wheel by hand. > >> > >> I'm quite surprised that the loose gaiter clip would change the > >> vibration, I'm sure they are small enough mass that they wouldn't cause > >> it in themselves but maybe the more secure gaiter is damping some of > the > >> vibration, maybe from a worn joint. > >> > >> Jim > >> > >> > >> > >> -----Original Message----- From: Derek Clews > >> Sent: Wednesday, October 09, 2013 12:23 PM > >> To: [email protected] <javascript:> > >> Subject: Re: [Quantum Owners] Balancing a drive shaft > >> > >> 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] <javascript:>> > >> <[email protected] <javascript:>> 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] <javascript:> > >>> 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] <javascript:> > >>> 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]<javascript:> > >>> To unsubscribe from this group, send email to > >>> [email protected] <javascript:> > >>> 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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