A340E Valve Body, remanufactured and ready to install. Fits the A340E. Ships fast from the USA.
If your Toyota 4Runner, Tacoma, T100, Tundra or Supra with the A340E four-speed automatic has started banging into gear, hanging in second, flaring on the 2-3 shift or refusing to lock the converter, the valve body is one of the first places a good transmission technician looks. This is a remanufactured A340E valve body with a 1-year warranty, cleaned and rebuilt so you bolt on a known-good hydraulic control unit instead of chasing worn bores one valve at a time.
The A340E is the Aisin-built electronic version of Toyota's long-running A340 rear-drive four-speed. Its valve body sits under the pan and holds the pressure regulator, the shift valves for each gear, the accumulator control circuit and the lockup relay valve that applies the torque converter clutch. The engine computer or ECT unit fires the shift solenoids to move those valves, and on the lockup solenoid circuit to engage the converter in overdrive. Because the A340E uses aluminum bores with steel valves, years of normal operation slowly wear the bores oval. Once that happens, oil leaks past the valves, line pressure drops or wanders, and the shifts that depend on that pressure get soft, late or harsh.
Sonnax, which builds repair valves for this family, lists low or erratic line pressure, delayed engagement, soft upshifts and TCC apply and release concerns as the conditions its A340 valve kits address. Those are the same complaints a tired factory valve body produces.
Check fluid level and condition first; a low pan level causes many of the same symptoms. Scan for codes and test the solenoids for resistance before replacing anything, since a single failed solenoid is cheaper than a full valve body. Our guide on testing a shift solenoid with a multimeter walks through that step. If the solenoids pass, a line pressure test is the clearest proof: pressure that is low, slow to rise, or unstable points to valve body wear or a worn pump. The transmission pressure testing guide explains where to tee in the gauge and what the readings mean. For harsh engagements specifically, the Aisin harsh or delayed shift walkthrough covers the order of checks on these Aisin units.
This listing is identified as an A340E valve body. Toyota and Aisin built several A340E valve body versions over the production run, and they are not all interchangeable. Sonnax identifies Type 1 bodies on casting 8931 for earlier units with three or fewer solenoids, and on 2000-later trucks a Type 3 body on casting 8935 for V8 applications with electronic throttle control only, and a Type 4 body on casting 8938 for V6 or V8 with either electronic or cable throttle control. Before you order, pull your pan, read the casting number on your upper valve body and count the solenoids and connectors. If you are unsure, send us your year, model and VIN and we will confirm before it ships. If your unit carries the newer solenoid layout, compare it with our A340E valve body with solenoids, and A341E owners should look at the A341E valve body instead.
Drain the pan, remove the filter and unplug the solenoid connectors. Note where the throttle cable or manual valve linkage attaches and where the check balls and accumulator springs sit before the body comes down, since several bolts are different lengths. Clean the case mating surface and the pan magnet thoroughly; metal left in the pan will damage the new bores quickly. Torque the valve body bolts evenly to factory spec in a criss-cross pattern so the plate does not warp. Fit a new filter and pan gasket, which our A340E solenoid, filter and gasket kit supplies along with fresh shift and TCC solenoids. Refill with Dexron-type ATF or Toyota T-IV as your owner manual specifies, then check the level hot with the engine idling. If the clutches already slipped long enough to burn, a valve body will not bring them back; in that case plan on the A340E overhaul kit as well. After the job, clear codes and drive through all gears so the computer settles its shift timing, as described in our adaptive relearn guide.
| Fits | A340E |
| Part type | Valve Body |
| Condition | Remanufactured |
| Brand | OEM |
| Reference | A340 |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
It fits A340E transmissions, but there are several valve body versions. Match the casting number on your upper valve body and your solenoid count, or send us your year, model and VIN to confirm before ordering.
If your solenoids are original and the truck has high mileage, replacing them with the valve body is cheap insurance. Test them first; if any read out of range, replace them as a set.
Most A340E applications take Dexron-type ATF, and later Toyota service calls for Toyota Type T-IV. Use what your owner manual lists and check the level hot.
It can if the slip is caused by low or unstable line pressure from worn bores. If the clutches or bands are already burnt, the valve body will improve control but you will still need a rebuild.
No. The A340E valve body comes out through the pan with the transmission in the vehicle. Plan on a few hours, a new filter and pan gasket, and fresh fluid.
