A750E Valve Body 2004, remanufactured and ready to install. Fits the A750E. Ships fast from the USA.
A 2004 Toyota 4Runner with the five-speed automatic that bangs into second, flares on the 2-3 shift, slips with throttle in third or fourth, or sets a shift solenoid or lockup code is usually telling you about wear in the valve body, not a gearset that is finished. This remanufactured A750E valve body is listed for the 2004 model year, the second year the five-speed was on the road, and it replaces the worn hydraulic control assembly as one unit instead of piecemeal repairs to individual valves and solenoids.
The A750E is the Toyota/Aisin five-speed rear-wheel-drive automatic that replaced the old four-speed in the 4Runner for 2003. Its valve body sits in the bottom of the case under the pan and does two jobs. Hydraulically, it takes line pressure from the pump and meters it through spool valves and bores to apply each clutch and brake, including the B1 brake that holds for fifth gear and engine braking. Electrically, it carries the shift solenoids, the line pressure solenoid and the lockup solenoid that the engine and transmission computer switch to choose gears and engage the converter clutch. By 2004 production, many of these units now have well over a decade of heat cycles behind them, and the soft aluminum bores are where they give up first.
Start with the fluid: check the level the Toyota way, at the fill/check plug with the fluid inside the temperature window the service information lists, and look at color and smell. Low or burnt fluid creates exactly the same flare. Then pull codes and watch live data on a road test, comparing commanded gear to actual gear. Be careful translating solenoid codes, because Toyota uses one name in the repair manual, another in the parts catalog and a third on the scan tool for the same solenoid. If an individual solenoid tests bad on the bench but the shifts are otherwise clean, a solenoid may be all you need; our solenoid bench testing guide walks through resistance and flow checks. If the solenoids are good and the complaint is flare or lazy shifts, the flare versus slip guide helps separate a valve body pressure problem from worn clutches.
This listing is for the A750E as installed in 2004 vehicles. For that year the five-speed was found in the 4Runner (A750E on two-wheel drive, A750F on four-wheel drive) and in the four-wheel-drive Lexus GX470, which uses the A750F. The 2004 Tacoma and Tundra still used the older four-speed, so this part does not apply to them. Toyota made running changes within the A750 family, and the E and F versions are not always interchangeable, so match the transmission code on the case, the valve body casting and the solenoid connector against your old unit, or send us your year and VIN before ordering. Browse every A750 part on the Aisin transmission parts page. If your truck is a little newer or older, compare the 2003-2007 A750E valve body.
The valve body comes out from below after the pan, filter and solenoid harness connections are removed; note where each bolt length goes, since they differ. Drain and replace the fluid and filter during the job so debris from the old unit does not feed straight into the new one, and refill only with Toyota WS ATF. Torque the valve body bolts in a crossing pattern to the factory figure. Afterward, clear codes and reset the transmission's learned values with a capable scan tool, then drive it gently through every gear so the computer can relearn shift timing; our adaptive relearn guide covers why that matters. If the converter clutch was slipping, a new A750E TCC solenoid is inexpensive insurance, and if the fluid showed heavy friction debris, plan on the A750E master rebuild kit instead of a valve body alone.
| Fits | A750E 2004 |
| Part type | Valve Body |
| Condition | Remanufactured |
| 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.
No. The 2004 Tacoma used Toyota's older four-speed automatic. The five-speed A750 family arrived in the Tacoma for 2005. For 2004, the A750 series was used in the 4Runner and the Lexus GX470.
Four-wheel-drive 4Runners and the GX470 carry the A750F code on the case. The valve bodies are closely related but not guaranteed identical, so send us your VIN or match the casting and part number on your old valve body before ordering.
Toyota WS ATF only. Generic multi-vehicle fluids can change shift feel and lockup behavior. Check the level at the fill/check plug with the fluid at the temperature Toyota specifies.
Yes. Clear codes and reset the learned shift values with a scan tool that supports Toyota transmissions, then drive through all five gears with light and moderate throttle so the computer adapts to the new valve body.
It can. A single failed shift or lockup solenoid can set codes and cause harsh shifts. If one solenoid tests bad and the bores are not the issue, replacing that solenoid may solve it. Widespread flare, slip and pressure complaints point to the valve body as a whole.
