A750F Shift Kit 2005-2015, new and ready to install. Fits the A750F. Ships fast from the USA.
A 4x4 Tacoma, 4Runner, FJ Cruiser or Tundra that suddenly pulls away from a light in what feels like fourth gear, refuses to go past second, or sets a P0751 code is often pointing at one part: the S1 shift solenoid. Please note what this listing actually is. Despite the "shift kit" name in our catalog title, this is a single new S1 shift solenoid for the A750F five-speed, referenced to part numbers 35240-60010 and 35240-34010. It is not a valve body recalibration kit. If you want a TransGo-style shift kit instead, see the sibling A750F shift kit (2003-up).
The A750F is the four-wheel-drive version of Aisin's five-speed rear-drive automatic, with the transfer case bolted to its tail. It has no throttle cable or governor; the engine computer picks every gear and switches two on/off shift solenoids, S1 and S2, to move the shift valves. Toyota's repair manual shows S1 energized in 1st and 2nd and switched off in 3rd, 4th and 5th. When S1 changes state, the hydraulic path changes with it, so a solenoid that sticks or leaks does not just make a shift feel soft. It puts the truck in the wrong gear altogether.
Toyota uses three names for this one part. The repair manual calls it S1, the parts catalog calls it 3-way transmission solenoid No. 1, and a generic scan tool reports it as SSA or shift solenoid A. Sonnax lists its resistance as 11 to 15 ohms, the same range as S2 and SR, while the linear pressure solenoids read about 5 ohms.
Toyota lists more than the solenoid as a cause of P0751: a stuck SLT line pressure solenoid, a blocked valve body or internal clutch and brake damage can all produce the same wrong-gear result. Warm the transmission, check the fluid level using the factory procedure, and look at the fluid. Dark fluid with friction material in the pan points to a rebuild, not a solenoid. With a capable scan tool, the Active Test lets you command gears below 30 mph and compare the commanded gear with the actual one. Unplug the solenoid and confirm 11 to 15 ohms. If several solenoid codes are present, a full A750F solenoid kit is usually the better buy than one part.
This listing is titled for 2005-2015 A750F trucks: 4x4 Tacoma V6, 4Runner, FJ Cruiser, Tundra and Sequoia (through 2009), and Lexus GX470 (through 2009). The S1 is shared between the A750E and A750F, so the 2WD version takes the same solenoid. Before ordering, compare the part number and the bracket on the solenoid you remove with the photo. If you are not sure, send us your year and VIN and we will check it. More parts for this family are on our Aisin transmission parts page.
S1 mounts on the valve body, so the pan and filter come off. That is the right time to fit a new A750E/A760E filter and pan gasket kit. Note where the harness clip and bracket bolt sit before removing the old solenoid. Lightly lubricate the new O-ring with clean fluid so it seats without rolling, then tighten the bracket bolt to the factory torque. Refill with Toyota WS fluid and set the level at the temperature given in the factory fill procedure, because these units are sensitive to over- and underfill. Clear codes and road test through all five gears. If the valve body bores are worn, a replacement A750F valve body fixes problems a new solenoid alone will not.
| Fits | A750F 2005-2015 |
| Part type | Shift Kit |
| Condition | New |
| Brand | OEM |
| Reference | A750E |
| 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 one new S1 shift solenoid (3-way solenoid No. 1, scan tool name SSA), referenced to 35240-60010 and 35240-34010. It does not include valve body springs, valves or instructions for recalibrating shifts.
Sonnax's A750E/F chart lists S1 for both versions. The difference between E and F is the transfer case, not the valve body solenoids. Match the bracket and part number on your old solenoid, or send us your VIN.
P0751 when the solenoid sticks mechanically, and P0973 or P0974 when the circuit reads low or high. Toyota's manual notes that P0751 can also come from the SLT solenoid, a blocked valve body or internal damage, so test before you replace.
Sonnax lists 11 to 15 ohms for S1. A reading far outside that, or an open circuit, condemns the solenoid. A solenoid that measures correctly can still stick, which is why the Active Test is useful.
Toyota WS automatic transmission fluid. Check the level with the engine running at the fluid temperature given in the factory procedure.
