bought the car used at 65km so I dont know if the previous owner took care of the transmission so at 89km I did my first transmission drain and fill, now Im at 108km having some problems shifting the gear so i checked the tranny fluid when the car was warm and engine running. Checked the fluid and the fluid is black. So its about time to replace the tranny fluid. Now I was wondering if should I do drain and fill or a flush? Please let me know, thanks.