the responses are very much appreciated - I might have access to a few sets of wheels and tires, even off another 4.6is, and the issue is still present with one of the good sets.

:sigh: even my 19 inch set with brand new snow tires sees the issue.

The shake is felt through the steering wheel, thinking that is where the bulk of the shudder is stemming. I will try the drive and brake with medium force again, and see where it leaves me.

Ill keep you all posted

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