Standard Ignition SC109 Automatic Transmission Output Shaft Speed Sensor

Automatic Transmission Output Shaft Speed Sensor

Standard Ignition SC109 is an automatic transmission output shaft speed sensor built for direct replacement service on select Chrysler, Dodge, and Jeep applications. It uses a female oval plug-in connector with a trans-mount location and a 2-terminal stud connection for a straightforward OE-style fit.

For Jeep Cherokee, Jeep Comanche, Dodge Ramcharger, and related platforms, the SC109 helps restore accurate transmission speed signal input for drivability and shifting performance. Standard Ignition SC109 is engineered with controlled manufacturing from component to finished sensor for consistent fit and function.

Key Features

• Automatic transmission output shaft speed sensor for transmission-mounted applications
• Female oval connector with plug-in design
• 2-terminal stud connection with male terminals
• OE-style replacement for select Chrysler, Dodge, and Jeep vehicles
• Built under controlled manufacturing processes for consistent quality
• Cross-references Walker Products 240-1025 for the same application

Detailed Description

The Standard Ignition SC109 is a transmission output shaft speed sensor used to monitor output shaft rotation and send the signal needed by the vehicle’s control system. Accurate speed input is important for shift timing, transmission operation, and speedometer-related functions on supported vehicles. This part number is commonly selected for 1990-1993 Jeep and Dodge truck and van applications, including Jeep Cherokee, Jeep Comanche, Jeep Grand Cherokee, and Dodge B-series and D-series platforms.

Standard Ignition manufactures this sensor with broad application coverage and quality control maintained through the production process. If you are replacing a failing transmission speed sensor on a Jeep Cherokee or Dodge Ramcharger, SC109 provides a direct-fit service part for the listed applications.

Vehicle Fitment

• Fits 1993 Jeep Grand Cherokee, N/A, to 7/16/92
• Fits 1991-1992 Chrysler LeBaron, N/A, w/o Speedometer Cable
• Fits 1990-1992 Dodge B150, N/A
• Fits 1990-1992 Dodge B250, N/A
• Fits 1990-1992 Dodge B350, N/A
• Fits 1990-1992 Dodge D150, N/A
• Fits 1990-1992 Dodge D250, N/A
• Fits 1990-1992 Dodge D350, N/A
• Fits 1990-1992 Dodge Ramcharger, N/A
• Fits 1990-1992 Dodge W150, N/A
• Fits 1990-1992 Dodge W250, N/A
• Fits 1990-1992 Dodge W350, N/A
• Fits 1991-1992 Jeep Cherokee, N/A
• Fits 1991-1992 Jeep Comanche, N/A
• Fits 1991 Jeep Grand Wagoneer, N/A

Common Problems This Sensor Can Address

• Incorrect or unstable transmission speed signal
• Harsh, delayed, or inconsistent shifting behavior
• Speedometer signal issues on supported applications
• Transmission fault codes related to output shaft speed sensing
• Intermittent drivability concerns tied to sensor failure

Installation Notes and Tips

Confirm connector style, mounting location, and transmission application before installation. The SC109 uses a trans-mount design with a female oval connector, so matching the original sensor configuration is important for proper fit. Inspect the harness connector and terminals for corrosion or damage before installing the replacement sensor.

Quality Assurance

Standard Ignition maintains manufacturing control from component sourcing through finished product assembly. The SC109 is produced to support consistent fitment and dependable service on the listed Chrysler, Dodge, and Jeep applications.