AB60E Solenoid Kit 2004-21

If your 5.7L Tundra or Sequoia is flaring between gears, dropping into a fail-safe gear, or setting P0751, P0756, P0761 or P0766, the nine solenoids bolted to the AB60 valve body are the first hardware to suspect after a scan. This is a new, complete nine-piece set: the five on/off solenoids (S1, S2, S3, S4 and SR) and the four linear pressure-control solenoids (SL1, SL2, SLT and SLU). Replacing all nine at once means every circuit on the valve body starts from the same point instead of mixing a new solenoid with eight tired ones.

What the solenoid kit does in an AB60E

Aisin built the AB60E (internal code TB-68LS) in 2007 as a heavier-duty version of the A761E six-speed for the 5.7L Tundra and Sequoia. It runs four rotating clutches, four brakes and four one-way clutches, so the computer has a lot of apply and release events to coordinate. The four on/off solenoids S1 through S4 select which shift valves are stroked for each gear, and SR works alongside them on the same feed circuit. The linear solenoids are pulse-width modulated at roughly 335 Hz: SLT sets line pressure, SLU controls torque-converter lockup apply, and SL1 and SL2 meter clutch apply pressure so shifts land firm but not harsh.

An unusual detail matters for diagnosis: the on/off solenoids on this family are fed straight line pressure from the manual valve, not reduced solenoid feed. A leak anywhere in that feed circuit starves all of them at once, which is why one tired solenoid or one leaking bore plug can trigger several codes.

Symptoms of worn AB60E solenoids

• P0751, P0756, P0761 or P0766 (S1, S2, S3 or S4 solenoid performance) - the computer saw the wrong ratio after commanding a gear
• Erratic, skipped or late upshifts, or the truck holding one gear in fail-safe
• Harsh engagements into drive or reverse, or bang-shifts when line pressure control from SLT drifts
• Torque-converter shudder at light throttle, which can follow a sticking SLU solenoid (converter clutch trouble is a known AB60 Tundra weak point)
• Codes that come back after a fluid change, because the problem is mechanical wear inside the solenoid rather than dirty fluid

How to confirm before buying

Those performance codes set on a ratio error, so a slipping clutch can set exactly the same code as a bad solenoid. Road test with a scan tool, watch commanded gear against actual input and output speeds, and check fluid level and condition first. Burnt fluid with friction material in the pan points toward clutch damage, not just solenoids. Our walkthrough on Aisin harsh or delayed shifts covers the scan-tool checks, and Aisin slipping under load helps separate a pressure problem from worn clutches.

Fitment

The set is cataloged for the 6-speed Aisin family that shares this solenoid layout: AB60E and AB60F in the 2007-2021 Tundra and Sequoia (5.7L, and the later 4.6L trucks) and the 2008-2021 Lexus LX570, plus A760, A761E and A960E applications in rear-drive Lexus models. If your truck has a 5-speed automatic, this is not your set. Because these units changed through the years, compare your old solenoids before installing: you need four slim linear solenoids and five shorter on/off solenoids with mounting tabs, with matching connector shapes. If you are unsure, send us your year and VIN before ordering. You can browse other Aisin parts from our Aisin transmission collection.

Install notes

• Solenoids are reached by dropping the pan and filter; most are held by a single bolt or clamp. Label each one as it comes out. SLT and SLU look nearly identical but are not interchangeable - swapping them can cause a no-reverse or lockup fault.
• Inspect the internal harness and connector pins for heat cracking while the pan is off, and lubricate new O-rings with fluid before seating them.
• If S1-S4 codes were the complaint, also check the bore plug behind the SR solenoid. A leaking OE plug dumps solenoid feed and line pressure to the sump, and new solenoids alone will not cure it.
• Install a fresh AB60E filter kit and refill only with Toyota WS fluid, checked at the correct temperature using the overflow-plug method.
• Clear codes, reset the transmission adaptive values with a scan tool, and drive the truck through all six gears so the computer can relearn shift pressures.

If clutch damage turns up during diagnosis, a complete AB60E valve body with solenoids or a full rebuild is the better repair than solenoids alone.

Which solenoids are in this AB60E kit?

All nine: the five on/off solenoids S1, S2, S3, S4 and SR, and the four linear solenoids SL1, SL2, SLT and SLU. That is the full set mounted on the AB60 valve body.

Will new solenoids fix my P0751 or P0766 code?

Only if a solenoid is the cause. These codes set when the computer sees the wrong gear ratio, so a slipping clutch or a leaking solenoid feed circuit can set the same code. Confirm fluid condition and watch commanded versus actual gear on a scan tool first.

Does this fit my 2008 Tundra 5.7L?

Yes, the 5.7L Tundra uses the AB60E or AB60F 6-speed this set is built for. Compare the old solenoids to the photo and send us your VIN if you want us to double-check.

What fluid should I use after replacing the solenoids?

Toyota WS (World Standard) ATF only. The AB60 is filled and checked through the overflow plug at a set fluid temperature, so follow the factory check procedure rather than guessing the level.

Do I need to relearn anything after installing?

Clear the codes and reset the transmission adaptive values with a capable scan tool, then road test through all six gears. Shifts may feel firm for the first few drives while the computer relearns.

Can I mix up the SLT and SLU solenoids?

They look almost the same, so mark each one on removal. Installing them in each other's bores causes problems such as no reverse or lockup faults.

• Aisin Harsh or Delayed Shifts: A Diagnostic Walkthrough
• Aisin Slipping Under Load: Root Causes and Fixes
• Aisin Overheating: Why It Happens and How to Prevent It