I have a 2001 Jeep Grand Cherokee 4.7 limited. I have a transmission leak from a sensor on the right side, passenger side, just above the rear of the transmission pan(545rfe). I was told this was a speed sensor, so I bought one. The sensor plugs in and is held with a bolt. The speed sensor I bought has only two tabs or prongs. The wiring harness has four wires attached to a plug that has a red square lock you pull out and then unplug it from the sensor. What is this particular sensor that has a four wire plug to it? The speed sensors I've researched only show two prongs and are located on the left side of the transmission. What is this sensor?