Four-solenoid set for the Subaru TR580 Lineartronic CVT valve body, supplied with fresh sealing O-rings and mounting hardware.
A 2012-2020 Impreza or Crosstrek with the 2.0L, or a 2013-2019 Legacy, Outback or 2014-2018 Forester with the 2.5L, that shudders at low speed, drops into a fixed-ratio limp mode, flashes the AT temperature light or sets a lock-up or transfer clutch solenoid code, very often has a single failed solenoid on its TR580 valve body. Subaru does not sell those solenoids on their own; the dealer answer is a complete valve body. This four-piece set gives you new solenoids with fresh O-rings and mounting hardware so you can repair the valve body you already have.
The TR580 is Subaru's chain-and-pulley Lineartronic CVT behind the four-cylinder engines. It has no gears to shift, so its solenoids control pressure instead: they set the clamping force on the primary and secondary pulleys that holds the chain ratio, the apply pressure of the torque converter lock-up clutch, and the pressure on the AWD transfer clutch that feeds the rear axle. ATRA identifies four of them, the lock-up duty, primary-up, primary-down and transfer clutch solenoids, as normally closed units shared between the TR690 Gen 1 and TR580 Gen 2 valve bodies. When one of these sticks, sticks partly open or loses its coil, the computer commands a pressure the valve cannot deliver, and you feel it as slip, shudder or a default ratio.
Start at the harness, not the pan. Transmission Digest describes unplugging the vehicle harness at the T4 connector and measuring each solenoid circuit from there, which tells you whether the fault is inside the transmission or in the wiring and computer; it gives 10 to 13.5 ohms for the TCC solenoid at that connector. The same article covers a 2015 Forester with P0970 where a new valve body did not cure the code because a resistor inside the transmission computer had burned, so check the circuit back to the computer before spending money. Fluid condition and level matter too, and our Subaru Lineartronic CVT service guide covers the level check on this unit. If the car is already in a default ratio, work through our CVT limp mode diagnosis first.
The listing fits 2012-2020 Impreza 2.0L, 2013-2020 Crosstrek 2.0L, 2014-2018 Forester 2.5L, 2013-2019 Legacy 2.5L and 2013-2019 Outback 2.5L. It is cross-referenced to Subaru control valve numbers 31825-AA050, -AA051 and -AA052 and 31706-AA030 through -AA033, and to Dorman 926-408. Subaru changed these numbers during the run, so read the number on your valve body and compare the connector, nose color and body shape of your old solenoids with the photos before you order. ATRA also notes that moving a lock-up duty solenoid between Gen 1 and Gen 2 bodies may need its wires cut and soldered. Not sure? Send us your year and VIN. Everything else we carry for chain CVTs is on our CVT parts page.
Drain the fluid and remove the pan and strainer. Photograph the harness and label each solenoid before you pull the retaining bracket, because the positions are not interchangeable. Lift each solenoid straight out; rocking it tears the O-ring and can leave a piece in the bore. Fit the new O-rings from the kit, lube them with clean CVT fluid, seat each solenoid fully and reinstall the bracket. Refill only with the Subaru CVT fluid your model calls for, such as genuine Subaru CVTF-II, set the level by the factory procedure, clear codes and run the relearn. If you also need the converter and AWD circuit valves, look at the TR580 torque converter and AWD solenoid kit; if the bores are worn, a complete TR580 valve body assembly is the better repair. Fluid, filter and pan gasket are not included.
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Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
The listing covers the 2013-2019 Outback 2.5L with the TR580. The 3.6R uses the larger TR690, so confirm your engine and compare your valve body number and old solenoids with the photos, or send us your year and VIN.
No. Subaru sells the complete control valve assembly, not individual solenoids, which is why aftermarket solenoid kits exist for this transmission.
ATRA and Transmission Digest both point to the lock-up duty (TCC) solenoid. It tends to open circuit when hot and set P2763, but the other solenoids can fail too.
Unplug the transmission harness at the T4 connector and measure each circuit. Transmission Digest gives 10 to 13.5 ohms for the TCC solenoid there. Check the wiring and computer as well, since a burned TCM can set the same codes.
Use the Subaru CVT fluid your model calls for, such as CVTF-II, never a universal ATF. Set the level by the factory hot-check procedure, clear codes, and let the transmission relearn before judging the repair.
