UPDATE

"New" Transmission was installed. They test drove the car for a day and then gave it back to me. Used car over the weekend. Highway and city driving. Was OK.

Yesterday noticed a "sound". Waiting to make a left turn, accelerate the car and turn, enter side road, make quick right hand turn into driveway. stop. Back up to turn around. Get a "klunk" or "clank" when car is traveling in reverse w/o foot on accelerator. hmmm? Can replicate this again and again by acclerating forward from stop. Braking to stop. Accelerating in reverse, taking foot from accelerator. Car remains in backward motion--a second later, "clunk". What is that?

Today traveling country roads to work. Accelerate to 35-40 mph. Come upon school zone. Brake quickly to 15mph. Remove foot from accelerator to "glide". Car "bucks" violently twice in a row. What the ...? Able to successfully replicate one time. Try two more times and cannot.

Haven't called the dealer yet. Waiting to drive the car some more and figure out what is going on.

Motor mounts? Suspension? Sway bars? Tranny? Software can't deal with sudden changes in velocity or inertia? Operator driving too aggressively? (I babied it over the weekend and started driving more aggressive as confidence built).