WHILE EXITING AN OFF RAMP CONSUMER BEGAN TO SMELL SMOKE. ANOTHER VEHICLE PULLED UP BESIDE THE CONSUMER INFORMING HIM THAT THE JEEP WAS ON FIRE. THE OWNER PULLED THE JEEP OVER, AND THE CONSUMER DISCOVERED FIRE UNDER THE REAR OF THE JEEP. THE FIRE DEPTARTMENT WAS SUMMONED, AND THE FIRE WAS EXTINGUISHED. THE JEEP WAS TAKEN TO AN INDEPENDENT SERVICE STATION, WHO INFORMED THE CONSUMER THAT THE DIFFERENTIAL PLUG WAS MISSING, AND THE LEAKY FLUID CAUSED THE FIRE. *AK