shudder at 45mph

[Highrisk]

From what I've seen, its independent of the RPM's.
Also - when we decided it had to be real was when driving on a freshly re-surfaced road. It's been acting this way for about two weeks.
When the AC and recirc are on, I've noticed a smell - that I think is antifreeze. Coincidence? Maybe.



Oh, but it gets better. She just called. She's leaving work, and the check engine light and the traction control lights are on. It's displaying
"Traction stabilization reduced power service stabilization system traction fail"

This would be the second time her stabilization system has malfunctioned and required repair. I doubt it is related to the shudder.. but who knows.