Voomon

Ive got an 08 3.2 S-line which has an odd rear ens shudder at different speeds.
This has been there since got it so on the last service I had them check the wheel balances and had the full all-wheel realignment etc and its all set to factory specs.
I drove off down the highway and the shudder is still there.
I have just changed to a new set of 19" rims and tyres and the shudder is still there, I though it must have been wheel balance but on second set of rims/tyres and its still there Im thinking its in the drive line - where is the best place to start looking for a solution?

Silvaleo

I'm running the same wheel size on my car but just an aftermarket set and I even got hub centric rings to the measurement the shop told me I needed to buy and even after wheel balancing and rotation I still have that shudder. So I took my 08 3.2 S-line to a European car shop to see if they could figure it out and they told me I had everything I needed and that the shudder wasnt going away but I dont know how I feel about this constant shudder. I want to go back to my titanium wheels but I hit a pothole in one of them now its dented 👎🏽.