Speed Sensor

does anyone know where the speed sensor is located on a 93 dak with a 3.9l auto is located. i dont think that it is working properly cause it is not shifting properly down or up, seems to shift up soon and shift down late. Or if anyone else knows what could be wrong???

On a 93 the only thing that is controlled by the speed sensors and various other sensor is torque converter lockup and 4th. Every thing else is hydraulically control by the transmission. You might want to have the kick down cable checked and adjusted as needed this can cause late/early down/up shifts it can also burn up all the clutches if adjusted improperly do to low line pressure.