This is the same four cylinder auto wagon with 109k miles I posted about late last year: the transmission was never serviced until a power flush about a year ago. We bought it this Fall, not knowing the full history. We had the fluid changed, and the pan allegedly cleaned this month (seeing "spill and fill" on the receipt wasn't reassuring). It still seems to be shifting ok; the main problem that's definitely transmission-related is it still takes a full second to shift into gear when cold. HOWEVER:
It's been pretty cold at night here, and I work a weekend night shift. the last two nights when I've driven home, I've gotten a shuddering from the front end at highway speeds. It isn't severe, but is definitely noticeable. The rpm isn't changing and it isn't shifting oddly, so I don't know if it's something like CV joints (but there is zero clicking, or binding at low speeds) or bad tire belts, or the transmission. I think it's still there when I shift down into third. It seems to stop after I get home, until the next frigid night. Thoughts?