Lock-Up Solenoid for Nissan RE4R03A JR403E 31940-41X10

Lock-up solenoid for Nissan RE4R03A and JR403E four-speed automatic transmissions. Cross-references Nissan OEM part number 31940-41X10 and is designed for the applicable non-PWM torque converter lock-up solenoid position.

This replacement solenoid is intended for valve-body service when testing identifies a faulty, sticking, damaged, or electrically out-of-specification lock-up solenoid. Confirm the transmission model and compare the original unit before ordering.

Product Details

• Product type: Automatic transmission lock-up solenoid

• Function: Torque converter clutch lock-up control

• Transmission applications: RE4R03A and JR403E

• Solenoid type: Non-PWM

• OEM reference number: 31940-41X10

• Vehicle brand application: Nissan, subject to transmission verification

• Quantity: One lock-up solenoid

Fitment And Identification

This solenoid is intended for applicable Nissan RE4R03A and JR403E automatic transmission configurations. Verify the original part number, solenoid design, connector, wire configuration, valve-body location, and transmission identification before purchase.

Do not rely only on vehicle year, make, or model. Jatco/Nissan transmission applications may use different solenoids within the same vehicle platform or model year. This unit should not be substituted for a PWM lock-up solenoid, pressure-control solenoid, or shift solenoid with a different configuration.

Competitor and OE references also associate 31940-41X10 with certain RE4R01A, JR402E, RE5R01A, and RG4R01A applications; those additional transmissions should be listed only after confirming the exact product matches your supplied solenoid and catalog fitment.

Service Guidance

Use this solenoid after proper diagnosis identifies a lock-up-solenoid-related concern. Torque converter clutch operation issues, shifting concerns, transmission warning lights, or fault codes can have electrical, hydraulic, mechanical, fluid-related, or control-system causes beyond the solenoid itself.

Follow the manufacturer service procedure during valve-body removal and installation. Inspect internal wiring, connector pins, retaining hardware, and fluid condition before reassembly. Refill with the specified ATF. Lubegard ATF Protectant may be considered only when compatible with the required fluid specification and used according to its instructions.