Oy!!!.....Something like that did happen to me on my 98'. Road was slick and when I wanted to change lanes the rear right tire (slightly worn) caught the white line and the car slipped and spun...fortunately it was late at night and no traffic in sight.....There was one main culprit, apparently the previous owner had the car towed and the car was fastened in the rear from one of the suspension arms and it got bent causing an uneven grip on my rear tires, thus if one of them gets more grip than the other the car banks to that side. Check your rear tie bars (you can see them from the back of the car, they run sideways) and if one of them is even slightly bent then that might be your problem....Good luck with te fix.
Chucky
Hybrid Mode
