A750E Solenoid Kit 2002-2016

If your Toyota Tacoma, 4Runner, Tundra, FJ Cruiser or Lexus GX with the Aisin A750E five-speed is flaring on the 2-3, banging into gear, refusing to lock the converter or dropping into limp mode with solenoid performance codes, the electrical side of the valve body is the first place to look. This remanufactured A750E solenoid kit replaces the whole set of valve body solenoids in one job, so you are not paying for a second pan drop when the next tired solenoid gives up a month later.

What the solenoid kit does in an A750E

The A750E has no throttle cable or governor. The transmission computer reads speed, load and throttle and then fires a set of on/off shift solenoids to move the shift valves, while linear solenoids meter line pressure, clutch apply pressure and torque converter lockup. The kit pictured is seven pieces: four long-body linear solenoids and three bracket-mounted on/off solenoids. When a coil weakens or a spool starts to stick in its bore, the computer commands a gear or an apply pressure the hydraulics cannot deliver, and the result is a shift that is late, soft, harsh or missing.

One thing that trips people up on this unit: every A750 solenoid has three different names. The repair manual, the parts catalog and the scan tool each use their own label, so a code that reads SSE on your scan tool is the SR solenoid in the manual and a 3-way solenoid in the parts book. Replacing the full set sidesteps that guesswork.

Symptoms of worn A750E solenoids

• Shuttle shifting, bind-up or flare on the 2-3 shift
• Slipping with throttle in 3rd or 4th gear
• Rough kickdown at highway speed from slow converter release
• Converter lockup that hunts, shudders or never engages, with P2757 (SLU solenoid performance) stored
• Shift solenoid performance codes such as P0751 or P0756, or pressure control codes such as P0746 and P0776
• Stuck in one gear or limp mode after the computer loses confidence in a circuit

How to confirm before you buy

Solenoid codes do not always mean a bad solenoid. Pull the codes, then check the external connector at the case: the A750 family is known for harness connector trouble when the weather seal fails and lets water in. Measure each solenoid circuit through the connector and compare against spec; our guide on testing a transmission solenoid with a multimeter walks through it. Also drop the pan and look at what is in it. Heavy clutch material means the solenoids may be a symptom of a bigger failure, and worn solenoid modulator or TCC relay valve bores in the valve body can set the same codes with perfectly good solenoids.

Fitment

This kit is listed for the A750E, the two-wheel-drive version of the five-speed, under a 2002-2016 range; the A750 itself arrived in 2003-model trucks. It is cross-referenced to the Lexus LX470. The four-wheel-drive A750F uses the same valve body solenoid layout, and we carry a matching A750F solenoid kit for 2002-2016 as well. Because Toyota revised the valve body and harness over the production run, compare the connector shapes and solenoid count on your valve body to the photo before ordering, or send us your year and VIN and we will confirm it. Browse every part for this family on our Aisin transmission page.

Install notes

• Drop the pan, note every connector position on the internal harness, and photograph it before unplugging anything.
• Swap one solenoid at a time so linear solenoids do not end up in the wrong bore; they look alike but are calibrated differently.
• Lube each new O-ring with ATF and seat the solenoid squarely so the O-ring does not roll or cut.
• Inspect the internal harness for heat-cracked insulation and replace it if it is brittle.
• Refill with Toyota WS fluid only, check level at the specified temperature, then clear codes and let the computer relearn shifts.

If the pan showed heavy wear, plan the bigger job now: an A750E overhaul kit or a replacement A750E valve body will save a repeat repair, and the adaptive relearn guide covers what the truck needs after either job.

Will this kit fit my 4x4 Tacoma or 4Runner?

Four-wheel-drive trucks use the A750F. The solenoid layout is shared, but we list a separate A750F kit for those trucks. Match the connectors and solenoid count in the photo to your valve body, or send your year and VIN and we will confirm.

How many solenoids come in the kit?

The kit shown is seven solenoids: four long-body linear pressure solenoids and three bracket-mounted on/off shift solenoids.

Can a P2757 code be something other than the SLU solenoid?

Yes. P2757 is a torque converter clutch solenoid performance code. A leaking harness connector, worn TCC valve bores or contaminated fluid can all set it, so test the circuit and inspect the pan before replacing parts.

What fluid should I use after installing it?

Toyota WS (World Standard) ATF. Do not substitute a universal fluid, and check the level hot using the overflow tube procedure for your truck.

Do I need a scan tool after replacing the solenoids?

It is strongly recommended. Clear the stored codes and reset or relearn the shift adaptives so the computer stops compensating for the old solenoids.

• How to Test a Transmission Shift Solenoid With a Multimeter
• Adaptive Relearn After a Valve Body Swap or Rebuild
• Toyota Camry and Tacoma Transmission Service: What the Dealer Won't Tell You
• Aisin Harsh or Delayed Shifts: A Diagnostic Walkthrough