A follow up question to previous thread regarding "noise in the right rear of the jeep". Should the sensor alert me to this problem on the dash if it is the pinion, differential or anything along those line? The sensor is what caused me to go in for service. The only thing they said was found is low air pressure in the spare tire and a possible oil change (they said the oil change could have waited but I had them do it anyway). The noise was there after the oil change as I was driving home.