i forgot to mention first is to make sure the fluid level for the tranny is good, check this while the engine is running, and for labor and rebuild it cost 2500 to do from a idependent shop, so im sure a new tranny would be cheaper i wish i would have known this back then, as for wanting to know everything about your misfire problem it could also be a injector or coil pack problem, but the wires and plugs i would difently do first, is the engine light on? also did you install the termostat right?