found the issue.

The Rear Differential. Had it flushed and drained, and found metal particles. With the new fluids the car runs smooth with not vibration. Hopefully the fluid change solved the problem, but only time will tell.

 

Sorry for delay in my reply.

Thank you Freewilly - from your description, I'm experiencing the same problem. I have set an appointment to have the rear diff fluid flushed and changed.

 

Good luck. I hope this works. Let me know.

 

The vibration or rumbling is back, but only in extreme steering lock, and much milder then before.

Thought I let everyone know. The flush didn't totally fixed the problem.

Will.