This is 1000% tone ring symptoms. If the dealership hasn't mentioned it, you need to get the car out of the hands of the incompetent fools. Easy, inexpensive fix.
I feel old age has set in. I replied to this same thread over a year ago with the same response, and no memory of it. At least i'm sure that i have the same memory of what happened 25 years ago. Dementia setting in already? lol