2006 gs300 AWD , stock everything ,
I am experiencing heavy wobble,front section from 5 to 20 kmh , , like an unbalanced washing machine starting the spin cycle
and again milder around 60 to 80 kmh,, ,
this is after tire change over to michelin pilot hx mxm4 65% thread .. professionally balanced .

I could still feel it with the blizzaks at low speeds, but way way less.
,
Both sets are 225 50 17 93v 35psi on original mags as per book
,I have read all the postings relating to suspension ect., not much talk about this problem with non modified gs 300 AWD,,or gs350 AWD

I was wondering if it could have any thing to do with tire wear geometry,
or perhaps drive shafts ,but no clicks or noise from them

My Gs is trying to tell me something but we don't speak the same language ,

Can someone please help me translate !!!

 

Update
found a little shimmy on front left mag after lifting the car from all 4s and putting it in drive
So i moved the culprit to the rear , will go on the hway to test it out

 

It's probably a broken belt in your tire hit any pot holes latly

 

I had similar problems with wobble/vibrations on stock suspension and on coilovers. I grabbed the Sage RCA kit and it got rid of my wobble/vibes almost completely