Transmission Speed Sensor

Transmission speed sensors are used to perform a contactless scan of a gear or trigger wheel in the transmission and generate an electronic digital signal proportional to the speed of rotation. There are commonly two speed sensors that work in conjunction to provide accurate transmission data to the vehicle’s (ECM) engine control module or (TCM) transmission control unit. The first is known as the input shaft speed (ISS) or primary sensor. This sensor is used to monitor the speed of the transmission’s input shaft. The second sensor is the output shaft speed (OSS) or secondary sensor. If either of these two sensors falls out of alignment or experiences electrical issues, it can affect the operation of the entire transmission.

• Ensures accurate measurement of transmission speed
• Contactless scan for improved reliability
• Generates electronic digital signal proportional to rotation
• Works in conjunction with vehicle's engine control module or transmission control unit
• Monitors input and output shaft speeds for optimal performance
• Fits compatible vehicles listed in compatibility list
• Please read any associated notes before purchasing