A750E Planetary 2003, used and ready to install. Fits the A750E. Ships fast from the USA.
If your two-wheel-drive Toyota with the A750E five-speed has started to whine with road speed, lost first or reverse, or dropped glitter into the pan, the rear planetary is one of the hard parts to inspect. This is a used, original-equipment A750E rear planet assembly for 2003-and-later 2WD units: four pinion gears, a 25-tooth sun gear and a shaft roughly 13 inches long. It carries the industry interchange reference 117584A, which is the quickest way for a rebuilder to match it on the bench.
The A750E builds its five forward ratios (3.52, 2.042, 1.40, 1.00 and 0.716) and its 3.224 reverse by holding or driving different members of its planetary gearsets with clutches and brakes. The rear set sits at the back of the case next to the 1st and reverse brake, and Toyota's service data lists its specs right alongside that brake and the intermediate shaft. Because the sun gear on this part is joined to a long shaft, a bent shaft or worn bushing shows up as noise and runout, not just chipped teeth.
Start with the fluid. Dark, burnt ATF points at clutches, while a fine metallic sheen with normal color points at gears and bearings; our ATF color and smell chart walks through what each looks like. Road-test with a scan tool so you know which gear the noise lives in. Once the unit is apart, measure pinion thrust clearance: Toyota's A750F service data gives 0.2 to 0.6 mm for the rear planetary pinions and a 20.075 mm standard bushing bore, with intermediate shaft runout held to 0.08 mm. Anything outside those numbers, blued pinions or pitted sun gear teeth means replacement. Our guide to thrust washers and end play covers the feeler-gauge work.
This rear planet is marked for 2003-and-later A750E two-wheel-drive transmissions. The first A750E application was the 2003 4Runner V8 with two-wheel drive; the same family later went into 2WD Tacoma, Tundra, Sequoia and FJ Cruiser models. The four-wheel-drive A750F uses a different rear section, so 4x4 owners should not assume this length fits. Before ordering, compare tooth count (25T sun), pinion count (four) and overall length with your old part, or send us your year and VIN and we will check it. Browse every Aisin-built unit we support on the Aisin transmission collection.
A planetary rarely fails alone. If you found metal, plan on clutches, a filter and a careful cleaning of the valve body before the truck goes back on the road.
| Fits | A750E 2003 |
| Part type | Planetary |
| Condition | Used |
| 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.
It is marked for 2WD A750E transmissions. The 4x4 A750F has a different rear output arrangement, so compare length, sun gear tooth count and pinion count against your old part, or send us your year and VIN before ordering.
A planetary whine follows road speed, not engine speed, and is usually loudest in the gear that loads that gearset. Metal on the pan magnet with otherwise normal fluid color supports it. Final confirmation is a teardown and a pinion thrust clearance check.
Toyota's A750F service data lists 0.2 to 0.6 mm (0.008 to 0.024 in.) for the rear planetary pinions. Measure it with a feeler gauge on the bench before installing any used gearset.
Every thrust washer, thrust bearing and bushing in the rear section, plus the filter and seals from a rebuild kit. Flush the cooler and lines to remove debris from the failed parts.
Toyota WS (World Standard) ATF. Do not substitute Dexron or a generic multi-vehicle fluid; the shift calibration is built around WS viscosity.
