Rear end vibrations on highway
Have you checked the flex disks?
Also, silly, but have you check the torque on the wheelbolts?
Rock the wheel in every direction to look for wear in ball joints or bearing.
Spin the wheel round and look for a buckle in the rim, bulge in the tyre, or the tyre tread moving in and out as it spins round. If the wheel isn't round, it will shake even if it is balanced.
Then push the wheel down hard against the suspension, and see if there's any play in the suspension bush.
Take the wheel off and check for foreign objects between the bub and the wheel.
Nick
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I had them checked at 2 garages and they couldnt find anything, then had them checked at a 3rd garage for a 3rd opinion and he also couldnt find anything. Just out of curiousity i pointed to the big subframe bushes and he checked them. The rear subframe has 4 bushes, 2 at the front and 2 at the rear. The rears were ok but the 2 front ones were completely shot.
Have had them replaced now and although the vibrations havnt completely disappeared they have mostly disappeared. So these bushes were part of the problem. Im going to have the rest of them re-checked again just incase something else has been missed out.
So as mentioned above, get the the subframe bushes checked.
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I had them checked at 2 garages and they couldnt find anything, then had them checked at a 3rd garage for a 3rd opinion and he also couldnt find anything. Just out of curiousity i pointed to the big subframe bushes and he checked them. The rear subframe has 4 bushes, 2 at the front and 2 at the rear. The rears were ok but the 2 front ones were completely shot.
Have had them replaced now and although the vibrations havnt completely disappeared they have mostly disappeared. So these bushes were part of the problem. Im going to have the rest of them re-checked again just incase something else has been missed out.
So as mentioned above, get the the subframe bushes checked.
Front and rear.
Just speaking from experience with my 02 S430 RWD.











