A 2016 BMW 340i with 96,000 miles shifts fine on the flat. Then it hunts between fourth and fifth climbing SR 522 out of Bothell, and the owner decides that is simply how the car drives now. It isn’t. That is nine-year-old automatic transmission fluid, heat-cycled through a decade of Eastside commuting and never once drained.
BMW and Audi both describe several of these...