R34 steering shimmy

[rainster]

anyone had this expereince with there skyline.i have had this steering shimmy through my steering wheel at 100-110khm.i have replaced caster rod bushes and also had one wheel allighnment and two wheel balances on front wheels also i have levered and check for play in balljoints etc also had a look at steer rack bushes i found a bit of movement in them so i brought some aftermarket bushes they are whiteline they looked the same except the original bushes had rubber moulded around steel band and whiteline bushes were straight out rubber the guy said that they are for r33 but same for r34,anyway i installed bushes and tested for movement found it to be the same is this movement normal to skyline it moves aproximately 3mm from left to right or are the bushes different from r33 to r34,the bushes that were orginally fitted on right side on rack is a two piece rubber coated steel bush on left side just rubber ring,by the way the shimmy still very much there. hope some one can answer my question

[Abo Bob]

I've got the same issue at the moment actually but I haven't yet tried to fix it.

[Bass Junky]

How much tread is left on your front tyres....

I had this on a Commodore a few years back and the tyres were almost knackered.

Change to new tyres, all good.

[rainster]

they are about half worn but dont want to replace them as yet as i want to get 18" rims with 235 on rear and 225 on front cost about $2000 to do so saveing up at moment but hate the shimmy as it affects handling and lane changing at 100 khm .the other thing im suspect is the offset of the rims ive got but dont quite no how to measure this to find out does any body no how to do this.

[Bass Junky]

Does it go away after 110?

When was the last time you had a wheel balance.

Maybe as the tyres wear, they change their balance slightly?

[Rain]

I had the same prob on my GTt. The only thing that fixed it was Hub locaters. To save money, most wheel makers dont change hub sizes they just change stud patterns on their wheels to fit differant cars. Hub locaters are just plastic inserts you knock in the back of your wheel. This leaves no gap between the wheel and hub.

One thing to note though. If you have been driving with that shudder for a while you will probably need to get new tires. The problem stayed with me untill I got new rubber as well as the hub locaters. I think the shudder sends the tire out of shape.

This may not be your problem but it worked for me.

Craig

[Sydneykid]

It has been my experience that speed related vibration is nearly always a balance problem. Have you had the tyre balance checked on the car? That will determin if it's a fitting problem, it will also eliminate other out of balance items like brake rotors. It may also be worthwhile trying the rear wheels on the front, even if it is only for a short drive down the highway.

I have noticed a tendency lately for tyre shops to only balance to the outside of the rim. I always have mine balanced inside and outside. Some brands of tyre are well known for having this problem.

Hope that is of some help:cheers:

[rainster]

hey sydneykid are you meaning dynamic and static balance? ill soon no if its tyre or rims as im getting some new mag and trye's this saterday im getting 17x8 rims and getting 235/45/17 federals tyers it will look good and hopefully shimmy gone

[rainster]

cheers for the advice guys just got new tyres and rims,took down the motorway got up to 100khm and more of course and no more shimmy all is good and car looks hot now with the mags.