I replaced the sensor on top of the differential. The light is still on. Do I have to reset the control module or should I replace the sensor on the transmission? I just want my truck to be happy.

 

I changed mine and the light didn't come back on. I would think you have other problems. I also changed my brother-in-laws also and same result. We checked the bad sensors with a meter for resistance. The bad ones didn't show any reading. The new ones gave a reading about 1600.

 

disconect batt. for 10-12 mins. w/lights in on position let it drain then reconect to reset system.M.W.