A750E Shift Kit 2003-2007, new and ready to install. Fits the A750E. Ships fast from the USA.
If your scan tool says "shift solenoid A" and your Toyota repair information only talks about S1, you are looking at the same part. This listing is that part: one new S1 shift solenoid for the 2003-2007 A750E five-speed automatic, referenced to 35240-60010 and 35240-34010. Our catalog title calls it a shift kit, but it is not a valve body kit. It is the single on/off solenoid behind many P0751 codes, starts in the wrong gear and trucks that will not upshift past second in early 2WD 4Runners, Sequoias, Tundras and Tacomas.
The A750E came out for 2003 behind the 4.7-liter V8 in the 4Runner, and from 2004-2005 it spread to the Sequoia, the V6 4Runner, the Tacoma V6 and the Tundra. Gear selection is fully electronic. The computer turns two shift solenoids, S1 and S2, on and off to stage the shift valves, while the linear solenoids SL1, SL2, SLT and SLU control clutch apply, line pressure and lockup. According to the factory manual, S1 is on in 1st and 2nd and off from 3rd through 5th.
Most of the confusion with this part comes from names, not mechanics. As Transmission Digest explains, every A750 solenoid has a repair-manual name, a parts-catalog name and a scan-tool name. For this one they are S1, 3-way transmission solenoid No. 1 and SSA. Knowing all three saves you from ordering the wrong solenoid. SR, for example, is 3-way solenoid No. 2 and sets P0986, not P0751.
On trucks this age, wiring is as likely a culprit as the solenoid. With the pan down, unplug S1 and measure it: Sonnax gives 11 to 15 ohms for S1, S2 and SR, and about 5 to 5.6 ohms for the linear solenoids. Then check the harness side for chafing or a loose connector. Toyota's P0751 procedure also lists the SLT solenoid and a blocked valve body as possible causes, so if you have several codes or the fluid is badly varnished, compare a single solenoid with the 7-piece A750E solenoid kit or a complete A750E valve body. Burnt fluid with clutch debris means the problem is mechanical, and the A750E master rebuild kit is the right path.
The listing is titled for 2003-2007 A750E applications: 2WD 4Runner (V8 from 2003, V6 from 2005), 2WD Sequoia from 2004, and 2WD Tacoma V6 and Tundra from 2005. The 2007 FJ Cruiser 4x2 also used the A750E. The same S1 is used in the 4WD A750F, including the Land Cruiser 100 and LX470 named in the reference listing. Brackets can differ between revisions, so hold your old solenoid against the photo and check its part number. If you are unsure, send us your year and VIN. Browse the rest of the family on our Aisin parts page.
Drain the fluid, drop the pan and remove the filter to reach the valve body. Unclip S1 from the internal harness, remove its single bracket bolt and pull it straight out. Coat the new O-ring with fresh Toyota WS fluid, seat the solenoid by hand and torque the bolt to the factory value. Reinstall the filter and pan, fill with WS and set the level hot using the factory procedure. Clear the codes and drive through every gear. If lockup shudder is part of the complaint, the 2003-09 SLU lockup solenoid sits on the same valve body and is worth replacing while the pan is off.
| Fits | A750E 2003-2007 |
| Part type | Shift Kit |
| Condition | New |
| Brand | OEM |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Yes. Sonnax's A750E/F chart lists S1 as SAE name SSA (shift solenoid A) and parts name 3-way transmission solenoid #1.
No. It is one solenoid. Plan on a filter, pan gasket and Toyota WS fluid for the job, since the pan has to come off.
Toyota's P0751 chart covers forward gears. A stuck-off S1 starts in 4th, and a stuck-on S1 holds 1st and 2nd. Loss of reverse alone is not on that chart, so have the transmission diagnosed before you assume it is S1.
The 2003 4Runner V8 used the A750E (2WD) or A750F (4x4), and both use the S1 position this solenoid fills. Compare the bracket and part number on your old solenoid, or send your VIN.
Clear the codes and road test through all five gears. If shift quality stays inconsistent afterward, look at line pressure and the valve body rather than repeating solenoid replacements.
