Standard Ignition SC390 Automatic Transmission Output Shaft Speed Sensor

Automatic Transmission Output Shaft Speed Sensor

Standard Ignition SC390 is an automatic transmission output shaft speed sensor built for direct replacement service. It uses a 2-wire layout with a male oval plug-in connector and direct attachment for a clean OE-style connection on select Toyota applications.

Key Features

• Direct attachment for straightforward sensor replacement
• Male oval connector with 1 connector and 2 blade terminals
• Black and grey housing for OE-style fit and appearance
• No wiring harness, mounting bracket, or hardware included
• Standard Ignition SC390 for transmission speed signal service

Detailed Description

The Standard Ignition SC390 output shaft speed sensor monitors transmission output shaft speed and sends the signal used by the vehicle control system for shifting and drivability functions. This sensor is listed for 1985-1991 Toyota 4Runner, 1995 Toyota 4Runner, and 1985-1991 Toyota Pickup, making it a focused replacement for common Toyota truck and SUV applications. If you are searching for a Toyota 4Runner transmission output shaft speed sensor or a Toyota Pickup speed sensor replacement, SC390 provides the correct connector style and direct-fit configuration for the listed vehicles. This part cross-references 8941135010 for the same application.

What It Helps Fix

• Erratic or missing transmission speed signal
• Harsh, delayed, or inconsistent shifting
• Speedometer or transmission control concerns tied to output shaft speed input
• Diagnostic trouble codes related to transmission speed sensor performance
• Intermittent drivability issues caused by a failing sensor connection

Installation Notes and Tips

Verify connector shape, terminal style, and vehicle application before installation. SC390 uses a direct mount design with a male oval plug-in connector, so the existing harness should match the sensor interface on the listed Toyota 4Runner and Toyota Pickup applications. Inspect the transmission connector and wiring for corrosion, bent terminals, or damaged insulation before installing the new sensor. Confirm the sensor seating surface is clean to support proper signal operation.

Quality Assurance

Standard Ignition supplies replacement electrical and sensor components for service applications, and SC390 follows an OE-style configuration for the listed fitments. Confirm vehicle year and model against the fitment data before ordering.