A340E Tcc Solenoid 1985, new and ready to install. Fits the A340E. Ships fast from the USA.
If your Toyota 4Runner, pickup, T100, Supra, Cressida or Lexus with the Aisin A340-series four-speed cruises at highway speed with the tach sitting a few hundred RPM higher than it used to, shudders as the converter tries to engage, or stalls when you roll to a stop, the converter lock-up solenoid is one of the first parts to check. This is a new aftermarket lock-up solenoid with its mounting bracket, reference A97425 (industry cross 97955), for A340E, A340F and A340H transmissions from 1985 on that use the original on/off style lock-up solenoid.
The A340E uses two shift solenoids to pick the gear and a separate solenoid to decide when the torque converter clutch is allowed to apply. The transmission computer energizes the lock-up solenoid once speed, throttle and temperature conditions are met, and the solenoid sends signal oil to the lock-up relay valve. That valve redirects converter feed so the clutch inside the converter clamps to the cover and the engine and transmission turn together. Drop the signal and the relay valve shifts back, releasing the clutch. On these earlier units it is a simple on or off switch, not a modulated solenoid: Gears magazine notes that Toyota only replaced the on/off lock-up solenoid with a modulated SLU solenoid in 2005, which is why a 2005-up unit needs a different part.
Start with the simple checks. Make sure the fluid level and condition are right and that the throttle position sensor reads smoothly, since a bad TPS was one of the most common A340 complaints in the Gears write-up and it directly affects lockup timing. Then unplug the solenoid connector and measure the coil with an ohmmeter, and apply battery voltage briefly to hear it click. Our guide on testing a transmission solenoid with a multimeter walks through both checks. If the coil tests good but lockup still misbehaves, the problem may be the converter itself or a worn lock-up relay valve bore, so read our TCC shudder diagnosis guide before ordering parts.
The listing covers A340E, A340F (four-wheel drive) and A340H transmissions from 1985 up that use the on/off lock-up solenoid with this style of bracket. The same Aisin solenoid family also appears in some Isuzu, Jeep, Lexus and Volvo applications. A340 valve bodies were revised several times, including the 2000 change that moved all solenoids to the side of the valve body on some trucks and the 2005 switch to the modulated SLU, so compare your old solenoid's bracket shape, connector and mounting position to the photo before ordering. If you are not sure, send us the year, model and VIN and we will check it. You can browse the rest of our Aisin parts on the Aisin transmission parts page.
The lock-up solenoid is serviceable in the vehicle. Drain the fluid, drop the pan, and remove the filter for access to the valve body. Disconnect the solenoid lead, remove the bracket bolt, and pull the old solenoid straight out of its bore. Lube the new O-ring with clean ATF, seat the solenoid fully by hand, and torque the bracket bolt lightly; the bolt threads into the aluminum valve body. Inspect the pan magnet for heavy clutch material, because a worn unit will burn up a new solenoid's job quickly. This is a good time to replace all three solenoids and the filter with the A340 and AW4 solenoid and filter kit. Refill with Dexron or Toyota T-IV type fluid as specified for your vehicle, check the level hot, then drive through several lockup cycles at steady cruise to confirm the RPM drop. If shifts are also firm or late, the A340E shift kit addresses the valve body side.
| Fits | A340E 1985 |
| Part type | Tcc Solenoid |
| Condition | New |
| Brand | OEM |
| Reference | A97425 |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Probably not. Toyota replaced the on/off lock-up solenoid with a modulated SLU solenoid in 2005, and that unit uses a different part. This solenoid is for the earlier on/off style. Compare your old part or send us your year, model and VIN.
The most common signs are high RPM at highway cruise because the converter never locks, shudder as lockup tries to engage, and stalling at a stop if the solenoid sticks open and keeps the converter clutch applied.
Yes. Drain the fluid, drop the pan and filter, unplug the solenoid, remove the bracket bolt and swap it. Lube the new O-ring with ATF and check the fluid level hot after the job.
A340-series transmissions take Dexron or Toyota T-IV type ATF depending on the year. Check your owner manual or dipstick marking and refill with that type.
If the transmission has high mileage it is worth doing all three solenoids and the filter while the pan is off, since they share the same fluid and age together. A three-solenoid kit costs little more than the labor of going back in.
