A750E Shift Kit 2005-2015, new and ready to install. Fits the A750E. Ships fast from the USA.
A two-wheel-drive Tacoma, 4Runner, Tundra or FJ Cruiser that pulls away sluggishly as if it were in a high gear, never climbs past second, or throws a P0751 code usually has one suspect inside the valve body: shift solenoid S1. Read this before ordering, because the product name says shift kit but the part is not a valve body recalibration kit. It is a single S1 shift solenoid for the Aisin A750E five-speed automatic, referenced to Toyota numbers 35240-60010 and 35240-34010. It is an aftermarket replacement solenoid, not a Toyota-boxed part.
The A750E is the rear-drive, two-wheel-drive member of the A750 family; the A750F is the same gearbox with a transfer case bolted on. Neither unit has a throttle cable or governor. The engine computer chooses the gear and switches the on/off solenoids S1 and S2 to move the shift valves, while separate linear solenoids handle line pressure, clutch apply feel and lockup. In Toyota's factory description of P0751, S1 is energized in first and second and turned off in third, fourth and fifth. Because each on/off combination maps to a gear, an S1 that sticks does not just make shifts feel soft. It sends the truck into the wrong gear.
Toyota's paperwork uses three names for this one part, which confuses a lot of buyers. The repair manual says S1, the parts catalog calls it transmission solenoid No. 1 (a 3-way valve), and a generic scan tool reports shift solenoid A. Sonnax's A750E/F solenoid chart lists S1, S2 and SR at 11-15 ohms, which separates them from the low-resistance linear solenoids.
Toyota's own list of P0751 causes includes more than S1: a stuck SLT line pressure solenoid, a blocked valve body and internal clutch or brake damage can produce the same wrong-gear pattern. Start with the fluid. Check the level with the factory warm procedure and look at what drains out; burnt fluid and friction material in the pan point to a rebuild, not a solenoid. Next, read live data and, with a capable scan tool, use the Active Test to command gears and compare them with the actual ratio. Finally, unplug S1 and measure it against the 11-15 ohm range. If the fluid is clean and S1 reads open or shorted, this is the part. If several solenoid codes are stored together, the A750E solenoid kit is usually better value than one solenoid. Our Tacoma transmission service guide explains why the fluid check comes first on these trucks.
The listing is for 2005-2015 A750E applications. The A750E was used in the 2005-2015 Tacoma V6, the 2005-2009 Tundra, two-wheel-drive 4Runner and FJ Cruiser models, the Sequoia and the 2003-2009 V8 4Runner. S1 is shared with the four-wheel-drive A750F, so 4x4 versions of these trucks take the same solenoid. Before ordering, compare the bracket, the connector and the part number on the solenoid you remove with our photos, or send us your year and VIN and we will confirm it. More parts for this family are on our Aisin transmission parts page.
S1 bolts to the valve body, so the pan and filter come off first. That makes it the right time to fit a fresh A750E filter and pan gasket kit. Photograph the harness routing and bracket position, remove the bracket bolt, and pull the old solenoid straight out. Coat the new O-ring with clean fluid so it does not tear on the way in, seat the solenoid fully and torque the bolt to the factory value. Refill with Toyota WS fluid and set the level at the temperature the factory fill-check procedure calls for, since these units do not tolerate an over- or underfill. Clear codes and road test through all five gears. If S1 tests good and the wrong-gear problem stays, the bores are the next suspect and a replacement A750E valve body is the repair.
| Fits | A750E 2005-2015 |
| Part type | Shift Kit |
| Condition | New |
| Brand | OEM |
| Reference | A750F |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
It is a single S1 shift solenoid, referenced to Toyota 35240-60010 and 35240-34010. It does not include the springs, plates or valves of a performance shift kit.
Yes. S1 is common to the two-wheel-drive A750E and four-wheel-drive A750F. Compare the connector and bracket on your old solenoid with the photos, or send us your year and VIN.
P0751 is the shift solenoid A performance code, meaning the computer saw a gear that did not match S1's command. P0973 and P0974 are S1 circuit low and high codes, which point to the solenoid coil or its wiring.
Toyota WS (World Standard) ATF. Set the level using the factory warm fill-check procedure for your model rather than guessing, because an over- or underfilled A750E can shift poorly even with a good solenoid.
If only S1 tests bad and only P0751 is stored, one solenoid is a reasonable repair. If S2 or other solenoid codes are present, or the truck has high mileage, a full solenoid kit saves dropping the pan again.
