A750F Overhaul Kit 2002-2009, new and ready to install. Fits the A750F. Ships fast from the USA.
This kit is for the four-wheel-drive side of the Aisin five-speed family: the A750F found behind the V6 and V8 engines in 4x4 4Runners, Tacomas, Tundras, Sequoias, FJ Cruisers, the Land Cruiser 100 and the Lexus GX470 and LX470. If your truck weeps fluid where the transmission meets the transfer case, takes a second to grab gear on a cold morning, or is coming apart for a rebuild, the K86900CA set supplies the gaskets, sealing rings and seals in one box. It is made in the United States and catalogued for 2002 through 2009.
Internally the A750F shares its geartrain with the two-wheel-drive A750E: five forward speeds from a 3.52 first to a 0.716 overdrive, all applied by oil pressure that the valve body directs to clutch and brake pistons. What changes is the back of the case, where the output shaft drives a bolted-on transfer case instead of a driveshaft yoke. That joint, plus the pan, pump and case passages, depends on gaskets and O-rings, while the rotating sealing rings and piston lip seals inside hold the apply pressure that clamps each clutch pack. When those seals harden from heat cycles, off-road load and towing, pressure bleeds away before it reaches the clutch, and a pack with plenty of friction left begins to slip. This kit replaces that sealing layer only; it contains no clutch plates, steels or filter.
Start with the transmission fluid itself: check level hot at the overflow plug, then look at color and smell. Burnt fluid or friction flakes in the pan mean the clutches need replacing as well. Next, test line pressure. TransGo documents that 2003-and-later A750 valve bodies wear the soft aluminum boost valve and bushing, which costs line rise under load and produces soft, flaring shifts with ratio and solenoid codes, exactly the complaints people blame on seals. Our walkthrough on shift flare versus slip helps you describe what the truck is doing before you tear it down.
The listing covers the A750F for 2002 to 2009. In North America the A750F appears from the 2003 model year in the 4Runner 4x4, GX470, Land Cruiser and LX470, then in the Sequoia 4x4 for 2004, the V6 Tacoma and Tundra 4x4 for 2005, and the FJ Cruiser 4x4 for 2007. Expect running changes within that window, so compare each gasket against the part you remove, and send us your year and VIN for a fit check if you want certainty. Two-wheel-drive trucks use the A750E, and every A750 part we carry is grouped on our Aisin transmission page.
| Fits | A750F 2002-2009 |
| Part type | Overhaul 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.
The K86900CA set is catalogued for both the A750E and A750F. We list it under each code so four-wheel-drive owners can find the version that matches the tag on their transmission.
FJ Cruiser 4x4 automatics use the A750F, and the kit is listed through 2009. Match the gaskets during teardown or send your VIN so we can confirm first.
The listing describes a transmission gasket set with rings and seals. Transfer case internal seals are not part of it, so check the adapter seal against your original and order transfer case parts separately if needed.
Yes. Leaking piston seals or sealing rings lower the apply pressure, so a clutch pack with usable friction material cannot clamp fully and slips under load.
Toyota WS automatic transmission fluid, with the level checked at operating temperature through the overflow plug.
