I drove Mom's 94 Mercury Grand Marquis(4.6 L V8, AOD trans) yesterday for about 80 miles. Got tires rotated & rebalanced, etc. She had said it felt like it was hesitating, or missing(her words), but I never saw or felt it before. Got a tuneup & few other things done at the local Ford dealership(exc sevc dept)last week, it's been really running good. But yesterday, I finally discovered what she had tried to describe. A big "bump" or "grab" when the dar slows down, sometimes when braking, sometimes not. Feels like maybe a harsh downshift to me, though the engine revs don't seem to change that much. Also felt like it tried to do it(you know, it was "thinking about it" ) when topping a steep hill on a highway later at about 65 mph. Any ideas? Something that can be fixed with a fluid change & band adjustment? She wants to start a 500 mile round trip *tomorrow* with that car. I sure hope it dowsn't eat the trans & strand her!