LDCRE Lock-up Solenoid for Subaru Lineartronic CVT TR580/TR690 — 3.2–3.7Ω Black, Direct-Fit Replacement

LDCRE Lock-up Solenoid (3.2–3.7 ohm) is a direct-fit replacement solenoid for Subaru Lineartronic CVT TR580/TR690 transmissions, restoring torque-converter lock-up and AWD transfer clutch control.

This compact, black lock-up solenoid (part numbers 31825AA050, 31825AA051, 31825AA052 and related OE codes) is made to work with select Subaru Legacy, Forester, Outback, Impreza and Crosstrek models equipped with TR580 or TR690 CVT transmissions. It controls hydraulic pressure used by the torque converter lock-up and AWD transfer clutch, helping the valve body regulate engagement timings and pressure during driving. The unit is sold singly and is intended as a direct replacement—verify your vehicle’s part number and transmission code before ordering.

Which Subaru models will this solenoid fit?

This LDCRE solenoid fits many Subaru vehicles equipped with TR580 or TR690 Lineartronic CVTs from roughly 2010–2017. Common fits include Legacy, Forester, Outback, Impreza and Crosstrek variants listed by model and trim years. Always cross-check the OE part number printed on your old solenoid to confirm compatibility.

• Compatible OE references: 31825AA050 / 31825AA051 / 31825AA052 and associated 31706-series codes.
• Typical models: Legacy 2.5i/2.5GT, Forester 2.5i/X, Outback 2.5i/Base/Limited, Impreza and Crosstrek versions (model years vary).
• Transmission types: Subaru Lineartronic CVT with TR580 or TR690 valve body designs.

How does this solenoid affect transmission performance?

The lock-up solenoid modulates hydraulic pressure to engage or release the torque converter lock-up clutch and to manage AWD transfer clutch operation. A working solenoid supports smoother shift behavior, better torque transfer, and more predictable AWD engagement, while a failed unit can cause flag symptoms such as codes or harsh engagement.

• Regulates pressure for converter lock-up and AWD transfer clutch.
• Helps the valve body achieve consistent engagement timing.
• Direct-fit electrical and hydraulic connections for clean replacement.

What should I check before buying and installing?

Confirm the part number on your existing solenoid and the exact transmission model (TR580 or TR690) listed in your vehicle’s service information. Inspect wiring and connector pins for damage before installing, and replace any damaged seals or valve body components as needed to ensure proper sealing and function.

• Verify OE code: 31825AA050/051/052 or matching 31706-series numbers.
• Check transmission type: TR580 or TR690 Lineartronic CVT.
• Replace O-rings and clean valve body bores when servicing the solenoid.

What does the package include and what are the specs?

Each order contains one AWD/lock-up solenoid as pictured. The coil resistance is specified within the 3.2–3.7 ohm range to match the electrical characteristics expected by the TR580/TR690 valve body circuits. Installation typically requires dropping the pan and accessing the valve body or designated service port depending on vehicle model.

• Included: 1 x LDCRE lock-up/AWD solenoid (black).
• Electrical resistance: approximately 3.2–3.7 ohms.
• Replacement references: TR580/TR690 31825AA050/051/052 and related numbers.

Who is this for: This LDCRE solenoid is meant for DIY mechanics, independent shops and fleet technicians repairing Subaru Lineartronic CVT systems who need a direct-fit replacement for torque converter lock-up or AWD transfer clutch control. It suits owners of compatible Legacy, Forester, Outback, Impreza and Crosstrek models who have confirmed OE part numbers and want a like-for-like solenoid with the correct coil resistance for TR580/TR690 valve bodies.

• Replacement Number: TR580 TR690 31825AA050 31825AA051 31825AA052 31706AA030 31706AA031 31706AA032 31706AA033.
• Fit Car Model: Subaru Crosstrek, Forester, Legacy, Outback, Impreza with CVT TR580/TR690 Transmission.
• Package Included: 1 x AWD Solenoid as pictured.
• Notice: Please check the part number before purchasing to ensure fitment.