I can say i had 2 accidents. the first was front the second was rear end. HOWEVER!!! most important after both accidents there were no vibrations.!!! this started around 80-90K

my first accident was around 30K front end but no damage to suspension or frame just bumper and upper hood.

my second accident i was clipped in the rear just bumper damage.

The only other thing that comes to mind was that one point i was short on cash and needed tires and found a shop that had the standard 17" rims with michelins on them that were only 1.5yrs old and pretty good thread left. I just swapped my rims for those but i did not have any vibrations at that time so that a side could i have bent rims ....that go unnoticed when balancing at low speed but become pronounced when speed is higher?

Hmmm.... This is probably not the fix but, I did experience something similar and it ended up being the bolts for the upper (forward) control arms needed to be torqued a little tighter and it fixed that little shimmy I had. Try it and I hope it works! Good Luck!

mine was a left front wheel bent... fixed and no more vibrations.

but was it the 17" i have 17" standard all around so...but either way saturday im gonna have them roadforce it to see...if that helps

hmmm it looks pretty tight but your right wont hurt to double check the nuts.

OK here is a question i hope someone knows how to answer.

If you raise one side (in this case left side) of the car. so that right front wheel is touching the ground then take the left wheel.

hold the left wheel at 9 and 3 and try to move left to right...in my case there is no movement i mean i forced as much as i could and in turn the whole car was moving on the jack so no bushing problems. however this part the whole assembly Attachment 49205

when i moved left to right the whole assembly in that pic would try to turn left and right just a bit (same amount as the wheel) but its very little. So i took hold of that spring and i could move it left and right just a bit.

so i opened the hood and took the dust cap (5)off the strut nuts.
Attachment 49206

so when looking down you have the main nut then the 3 smaller nuts and blow that is a rubber thing (i think number 7). large rubber bushing i guess now mine had fine hairline cracks i will take a picture tonight and post.

my question is: is the strut supposed to move like that? and if i have wear marks on that rubber thing (i think number 7) at the top of the strut is that normal and should i replace as in could that be causing my vibration?

I am having similar vibrations. Cruising at 110-130 Km/h there is an annoying shuddering of the entire vehicle. Rotated front to back and balanced all 4 wheels and tyres (today), and I still have the shuddering.
My front end shows no bad movement when I shake the rim/tyre when the car is in the air, neither did the rear. This week I'm going to return to the shop and ask them for a re-visit to the balancing. I will keep you informed of my progress. Hopefully it's progress. BTW, I have 20" wheels, non staggered, 285/something/20
PS. I think the assembly is supposed to twist as a whole unit. Not sure about the spring alone. Hopefully, an informed member will teach us!

I hope so...because i just replaced a brand new set of tires i drove at normal speeds 60-80mph and after just 3K miles tires were gone....so if this problem cant be found it has to be traded i can not sustain the amount of tires its going to go through lol

i knw the whole unit moves but should it be moving when all the components are tied together i though it supposed to be steady.....

Update 05/11/11

Went to the shop yet again to have that rubber thing looked at and it was all ok. so my left driver axle seems loose i mean you can grab it and shake it a bit...

second, my car has lost its alignment which is odd ive been driving very nice and just got one done 4-5 months ago. but I decided to replace the whole tierod assembly with lamfounder whatever brand. then i will go to butler tire. They do great alignment and highspeed roadforce balance at 130mphs so after that i would have spend 150+220+120labor=490.....and last would be the ball joints which are 34 bucks each from bilstein and if its not resolved bye bye goes the X.

Hey buddy, I too have this issue. But think mine is less sever then yours. I do have tire ware issues. But I do have the steering wheel shake as you described.
Has anyone looked around or pointed the finger at the steering box? I personally feel that the type of shakeing that the steering wheel does, I do feel (not hear) a slight hard material on hard material tap. Again, I don't hear it, just feel it.

Maybe a better definition is at each stroke of the shake, it has a definite, solid end point. Like shakeing a stick between two bricks. ( <-- but not that sever) This feeling does not remind me of a loose, worn out, or misaligned front end.

It reminds me of too much play between gear teeth to gear teeth. We will find these parts in the steering system, not the front of the chassis.

I'm just thinking out loud.