Replaces the pressure-control and lock-up solenoids in a Subaru TR690 and TR580 Lineartronic CVT to cure start-up jerk, 20-40 mph hesitation and slip.
A Subaru Outback, Forester, Impreza, Legacy, Crosstrek or WRX with the Lineartronic CVT that shudders pulling away, hesitates in the 20 to 40 mph range, lights the AT temperature lamp, or keeps setting a lock-up solenoid code like P2763 is very often suffering from one tired solenoid on the valve body. This kit replaces four of them, with four new isolator rings, for the TR690 and the smaller TR580, so you can fix a solenoid fault without buying a complete valve body.
Subaru's chain-type CVT is controlled entirely by solenoids on the valve body. ATRA's GEARS coverage describes seven of them: secondary linear, primary-up, primary-down, AWD transfer clutch, lock-up duty, lock-up on/off and forward/reverse linear. The primary-up and primary-down solenoids move the pulley ratio, the transfer clutch solenoid sets how much torque goes to the rear axle, and the lock-up duty solenoid controls torque converter clutch apply. ATRA Technical Bulletin 1922 notes that the lock-up duty, primary-up, primary-down and transfer clutch solenoids are all normally closed and interchangeable between Gen 1 and Gen 2 valve bodies, and that the lock-up duty solenoid is the one that fails: it goes open circuit when hot and sets P2763. That bulletin also notes Subaru does not sell the solenoids separately, which is why a kit like this saves a valve body.
Measure resistance first. The listing gives 12-13 ohms for the three lock-up style solenoids and 3-3.5 ohms for the pressure-control unit, and Transmission Digest gives 10 to 13.5 ohms for the TCC solenoid; check at the transmission connector with the harness unplugged, then again hot if the fault only appears warm. Our Subaru Lineartronic CVT service guide covers the fluid level check and the chain-slip test using graphed pulley speed sensors, which rules out mechanical damage. For codes that point at pressure rather than a solenoid circuit, start with the CVT harsh or delayed shift walkthrough.
The listing covers the TR690 and TR580 in the 2012-2023 Impreza, 2014-2023 Forester, 2016-2019 Crosstrek, 2013-2019 Legacy and Outback and 2015-2020 WRX. It references the valve body assemblies 31825AA050, 31825AA051, 31825AA052 and 31706AA030 through 31706AA033, which are the units these solenoids mount to. Subaru revised these valve bodies more than once, so compare connector style and solenoid shape with the photos, and note ATRA's point that a Gen 1 to Gen 2 swap of the lock-up duty solenoid may need the wires cut and soldered. Send us your year and VIN and we will confirm. More parts are in our CVT collection.
If the valve body bores are worn or the fault is not electrical, a complete TR690 valve body assembly is the next step.
| Fits transmission | |
| Vehicles | |
| Kit contents | |
| Lock-up solenoid resistance | |
| Pressure-control solenoid resistance | |
| OE numbers |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
The listing covers TR690 and TR580 Lineartronic CVTs in the 2012-2023 Impreza, 2014-2023 Forester, 2016-2019 Crosstrek, 2013-2019 Legacy and Outback, and 2015-2020 WRX. Match the connectors and solenoid shape with the photos or send us your VIN.
ATRA Technical Bulletin 1922 ties P2763 to the lock-up duty solenoid going open circuit when it gets hot. It is the most common solenoid failure on these units.
Often, yes, if the fault is electrical. Subaru does not sell the solenoids separately, so the dealer fix is a valve body. If bores are worn or the chain has slipped, solenoids alone will not fix it.
Use an ohmmeter. The listing specifies 12-13 ohms for the lock-up style solenoids and 3-3.5 ohms for the pressure-control solenoid. Test cold and hot, since the lock-up duty solenoid often fails only when hot.
Only the Subaru CVT fluid specified for your model year and engine. Do not use Nissan NS-2 or NS-3, universal CVT fluid or ATF.
One pressure-control (AWD/torque converter) solenoid, three lock-up solenoids and four isolator rings.
