I have a 1995 Dodge Spirit. After a hard acceleration, the transmission doesn't shift properly. For example it will only shift into 3rd at about 90 km/h (~60 mph). The shift from 1st to 2nd also occurs at much higher than normal speed. Turning the car off and letting it sit for a half hour resolves the problem temporarily. Any idea of how to fix the problem, (other than avoiding the occasional hard acceleration?)