Just jumping in to let you know that I appreciate everyone helping. And, to admit that I haven't touched the Burb for nearly 2 weeks. With the mild Winter we're having, being unusually dry, the attraction of making grocery and doctor runs with the Miata, is just too tempting. Rough roads have proven to be not even an annoyance for that car. It's the only car (out of nearly 40), that I've ever owned that doesn't rattle! I've been amazed, that I could drive into a car wash, wash the thing, even letting the high pressure wash and rinse get very near the window/top junction and get back in, and not find a drop of water, inside, except that which was on my shoes! A fantastic automobile. Of course, it just turn 21 K miles, which, for a 2016 car, is pretty low. In 22, I put less than 600 miles on it.
Gotta get "on-the-stick, and do some checking on the 4L80. I'll try to stay in touch, more diligently.