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The mkiv Supra Owners Club

steering wheel vibration (again)


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Ok well the other week I had my wheels off to paint the calipers,the next day on the motorway at 80 leps + I get a slight vibration feedback on the steering wheel - some people suggested this may well be the wheels needing rebalancing - which I thought may not be the case as no weights looked as if they had fallen off - I go this done yesterday but still get the vibration - any other suggestions ? Should I get the tracking and wheel alignment done ?

 

Why would this happen all of a sudden ? they seemed fine one day and the next time I drove the wheel was vibrating.

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you can find them here :

http://www.mkiv.com/techarticles/lance_alignment/index.html

 

the garage i took mine too asked for the model of the engine, JZA80, and they also had the stock settings.....

 

you can get problems getting them adjusted, on older models the adjustment bushes/bolts can get siezed -

mine cost me 40quid, all the front wheel vibrations went away and the handling improved by about 300% (thats not a mistype)

 

if its still vibratory - get them rebalanced at a professional / high performance place, the wheel balancing equipment used can also make a HUGE difference !!!!!!!

 

hope the servicing goes ok .

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If you have none stock wheels that are not a proper fit over the hub spigot they will always give you trouble. Wheel nuts and studs are supposed to act in tension ONLY, not loacate the wheel to the hub, that's the job of the concentric bits. The wheel will be running out of true, elliptically, only a few thou, but more than enough to give vibrations that change each time the wheel is removed and refited. The plastic abortions that the wheel palaces sucker you into using becauuse the wheels are wrong are nothing like good enough to do the job they are supposedly intended to do, proper machined ali or steel adaptors are the minimum you need, ideally you want wheels that actually fit :(

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Hmmm, I had 4 new tyres fitted this week with my service & suddenly developed this shakey steering wheel problem when driving 90mph+ (on a track of course!)

 

I assumed it was the new tyres being cold/not run-in. Does it seem likely they've been thrown on poorly & need re-alignment then?

 

I should hope not, as I'm selling the car & don't want to pass it on, if it should be sorted with the garage first. Should you have to pay extra to have them alligned when fitted? I thought that would be included anyway!

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Probably just need balancing properly. Most cheapo tyre places have crap balancing machines that aren't very accurate, and they don't pay that much attention to balancing the rears in my experience.

 

I also had a problem with a defective rear tyre a while ago. It looked fine, but it was so out of balance that you couldn't balance it up properly. They tested the wheel on it's own and it was perfectly balanced. The tyre got sent back to Continental who tested it and gave me a credit note. New tyre balanced up fine.

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Removing and refitting wheels, with or without a tyre cahnge, or removing and fitting new pads, et cetera, should never create the need for a wheel alignment change. Tyre changes should be acompanied by a re balance, of course, but if the wheels do not locate tightly on the hub spigots balancing is a total lottery.

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Thanks for the update guys - much appreciated,Chris the thing is my car was free of vibration until I had them off the other week,the wheels are AVS model and I beleive they have been used on other supras with success.

 

How can I tell if the locate tightly on the hub spigots ? they look like they are fine

 

 

also you might want to have a lok at the face that the wheels touch on the disks. The smallest bit of dirt , rust resedue can throw off the balance.

 

If you have a chip of rust in there it will make the fron wheels wobble.

 

Come to think of it there was a little notch on there but I really didnt think it would be affecting anything - will clear this off and try again

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you wamt about 5 thou clearance max.

 

 

Im not clear - is that 5mm ? clearence between the spiggot going through the hole ? Sorry but im not too technical and really dont have a clue what this means exactly :stupid: :twak: :blink:

 

 

Will thos not be the wheel alignment then ? since this went all of a sudden - garages I have taken it to dont seem to know what they are doing - toyota said I should replace the front suspension (?) I think I will have to bring her to you Chris if I cant diagnose this problem

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