i have a 96 mystique with the 2.0 liter and automatic, and a while ago it was doing the bang shift from 1-2 and then it did it really hard one time and it sounded like something broke, after that, when it shifted into overdive,it shifted really early at about 65-75 km/h, with rpm's at about 1750. when it shifted into overdrive it sounded like it was really lugging and the whole car would vibrate. about 2 weeks after all that, i was merging onto a freeway when all of the sudden the engine revved up a bunch, about 500 rpm more than normal, and continued to rev about 500 more than normal, also when it started doing the high revving thing, it would shift hard. about a week after that, it started shifting smooth and normal again, until it got to overdrive, where it would shift early and lug the engine. it stops doing the lugging thing and goes back to high revving when i have to accelerate hard, and then takes about a week to go back to normal. any ideas on what this might be?
