Hi all, I am new to this forum.
I have had from new a XR6, now done 7,200 kms. Since 1,000 kms, I have encountered wheel vibrations at between 80 and 100 kms per hour.
RIMs and tyres are standard 17 inch.
Car has been back 5 times with Wheel alignment, balancing, on car balancing, tail shaft balancing and finally, respotting of tyres. Vibrations still evident.
Tyre weights on RIMs are currently 56gms FR [Front Right], 36gms FL, NIL gms RR [Rear Right] and 68gms RL. This indicates to me that the tyres may be a problem.
The dealer has been great and looks like they will replace the tyres.
Has anyone else experienced the same problem? as I could not find any reference on the forum?
I have Brand new Dunlop SP 3000a's on my AU XR6 and have found them to be exceptional. I too have a small vibration (nothing worth worrying about but slightly noticable) between 90kph and 110kph. Of course I've NEVER gone any faster than 110kph (eat vomit Batcholar) however I suspect that it gets a little more noticable up to around 160kph After that I'm sure I'd be too bust to concentrate on the vibration.
Anyhow, that said I know it's not my 3000's as the exact vibration was there (even worse) with the older tyres which were yoko's rear and goodyears front.
I'm not saying it isnt the tyres, it's just that I have experianced something similar on more than one set of tyres.
On my car I suspect the need for a wheel alignment and/or replacing the front shocks.
I havent had a problem with the tyres after 23,000kms. I find them exceptional in grip, no vibrations & they are wearing well too. However I know a XR6 n/a owner who found significant stress cracks on the casing of join of sidewall & tread on the inside of all 4 Dunlop tyres at about 12,000k. Rather unusual & worthwhile checking next time you wash it.
The vibration that you talk of is the only thing that I can complain about on my car. It is not always noticable but it does come in at the same speeds that you mention. The noise seems to go away at higher speeds or maybe I start concerntrating on other things.
I have found that the tyres are pretty noisy on some road surfaces (this was noticed on a recent trip up to Syd and back. The Hume has many different surfaces and gave me many different noises). An easy fix for the problem is to turn up the stereo.
This problem of a vibration between 80 and 100 km/h sounds very familiar. A few months ago, after taking our XR6 in for a service, I noticed a vibration occurring around these speeds (that had never occurred before). I posted a topic about it at the time, which is located here - Interesting Driveline Problem
Basically in our case, the problem turned out to be the driveline, and, not the tyres. Though initially the tyres were suspected to be the culprit. However the tyres were ruled out as the dealer took all 4 tyres off and replaced them with a set of 16" steel wheels (of an XT), took the car for a run, and the problem still existed.
However, in your case, it sounds like it is a tyre issue, as everything else has been balanced.
Hopefully changing the tyres will fix the problem on your car.
BAII XR6T, Lightning Strike, M6, Sports Steering Wheel, 18" Wheels.
"Anyone can drive in a Straight line"
I have a vibration between 80-100 km/h. First noticed after the 15K service when the tyres were rotated. Subsequent balancing and alignments got me nowhere and my dealer has finally decided the cause of the problem is the tyres flat spotting. I know I have done nothing driving wise to cause this problem and I check the pressures on a weekly basis - 38psi. I have been offered no explanation as to how this could eventuate.
Waiting for the dealer to deliver the good news - 2 new tyres.
Hi all, been offline for a while. At my last visit with the dealer, they also tried to swap a set of tyres off another XR6 that had done 12,000kms. The vibration was not there.
I also contacted several tyre retailers, on average, the weights should not exceed 50 at the worst, hoever, I had 2 tyres at over 55gms on the RIM.
As per the other messages, they balanced the driveline twice, but that did not remove the problem.
Finally, Ford agreed to credit the tyres, but rather than put dunlops back on, I choose to have Pirelli P6000, which is comparable or better. The end result was to pay the difference of $20AUD per tyre to have Pirelli's which was great given the Pirelli's are much more expensive. Initially is was going to be around $100 per tyre, but I decided to get some of my own quotes and got this reduced, which they matched.
Since then, NOOOOOOOOO vibrations. Only comment I have with Pirelli's is that there seams to be a little sideways movement in the tyre, maybe they need more pressure and slightly more noisy than the Dunlops, but drive smoother.
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