Sensor, Speed: Operation: Operation
WARNING: This page is about a different car, the 2015 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
The Transmission Control Module (TCM), or Transmission Control Module Assembly (TCMA) is extremely sensitive to Electrostatic Discharge (ESD). Always use a ground strap and follow the ESD guidelines in ELECTROSTATIC DISCHARGE (ESD) SENSITIVE DEVICES. Failure to follow these instructions may result in damage to the TCM/TCMA.
The input speed sensor (ISS) and output speed sensor (OSS) are Hall-effect sensors that measure shaft rotational speed. The ISS (1) is located at the front of the TCMA and reads input shaft speed from the magnetic ring (2) on the P2 carrier.
The OSS (1) is located at the back of the TCMA and reads output shaft speed from the P4 carrier (2).