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[Omegatoy]

I get a bit of judder for the first few miles some mornings but it goes away again. Seems worse around 30mph. The speed of the vibrations suggest it can only be the propshaft because the wheels aren't turning fast enough for it to be imbalance.

Everything looks fine with the rubber dougnhuts and UJs on the prop shaft.

I have a theory, yet to be tested, that because my handbrake is rubbish it might be due to the car being parked on my slightly sloping driveway in "Park" with the transmission holding it. Since this leaves the propshaft under torsion for a long peroiod of time I wonder if the doughnut couplings get distorted slightly, resulting in imbalance. Once underway, they get a bit of heat into them and revert to their normal shape.

Sound plausible?

I'm going to try parking it carefully, making sure the handbrake is holding it before shifting into "park" and see if it goes away.

Kevin

Had the same t6hing!! shudder some mornings not others couldnt trace it until i changed the wishbones!! then its never returned!!! think its to do with worn bushes on the wishbones settling into position!!
Omegatoy

[Kevin Wood]

Mine's certainly coming from the rear end / body and I can feel it through the gearstick. Have been parking it properly for a few days and haven't noticed it again.

Kevin

[ians]

You could always swap front and rear wheels to eliminate wheels/tyres from the picture. (assuming the front is ok)

[Kevin Wood]

You could always swap front and rear wheels to eliminate wheels/tyres from the picture. (assuming the front is ok)

Yes, that's true. I've just had new tyres on the front so I know they're balanced. Just never had a tyre balance issue at such a low speed before.

Kevin

[ians]

If it is the wheels, I suspect you'll notice it easily through the steering.

[Ludvig]

Hi all!

This week end I got myself a new set of summer tyres for the omega and fitted them this evening. The shudder in the back is almost gone, although it is still noticeable. Next week I'll put in a new pair of shocks in the back to get the self levelling system to work properly (i.e. not pushing the rear all the way up, making it stiff as #&%¤). Hopefully, that'll eliminate the rest of the shudder.  8-)

Unfortunately, I had to refit the awful Hankook winter tyres again since the roads are still icy up here in the north. But in three or four weeks the roads will be dry and the Pirelli P7 are going back on!

Bye for now!

Ludvig