Possible suspension problem?

[stedolan]

Hi

I've been having a severe vibrating issue with my 2.8i which has gradually got worse over time and has got to a stage now were it can no longer be driven! It started with a suttle vibration (which could be felt through the steering wheel) and only occured when going round left-hand bends. The wheels have been balanced and the track control arms / rod ends, steering rack etc all seem to be ok. I can ony resume there's something wrong with the suspension. I have noticed on occasion, while leaning on the o/s front wing, that the car will suddenly drop - almost as if it was stuck in place! Also when I bounce either side of the front end the suspension seems to stick a little. Could this mean that my struts are shot? If so are the bilsteins difficult to replace and how expensive are new ones? Any advice will be much appreciated. Thanks, Ste

[csr]

There is a felt collar in the strut where the piston tube goes through top top bearing in the outer case.
Its dry!
They are assembled with a red greace but LM would do.
This will stop the struts sticking - not sure about the wobble.