Full overhaul, friction and steel plate kit to rebuild the Aisin A750E/A750F 5-speed in a Toyota Tacoma, Tundra, 4Runner or Sequoia after slipping.
A Tacoma that flares into third on the highway, a 4Runner that slips pulling a trailer up a grade, a Tundra or Sequoia that bangs into Reverse after it warms up: on trucks with the Aisin A750E or A750F five-speed, those complaints usually trace back to worn clutch packs and hardened seals. This master rebuild kit carries the friction plates, steel plates, overhaul gasket set and the rubber seals, sealing rings and O-rings needed to renew both the two-wheel-drive A750E and the four-wheel-drive A750F in a single overhaul.
The A750 is a longitudinal five-speed with ratios of roughly 3.52, 2.04, 1.40, 1.00 and 0.72. Each gear is produced by applying a different combination of multi-plate clutches and brakes, and the transmission computer controls those applies through solenoids on the valve body while it watches input and output shaft speed. The frictions in this kit are the surfaces that actually hold torque; the steels are the reaction plates they clamp against; the seals and sealing rings keep apply oil inside each piston and rotating drum. When frictions glaze or seals harden after years of towing and heat, pressure leaks away and the clutch slips during and after the shift. Replacing every friction, steel and seal together is what makes a rebuilt A750 shift like a new one rather than a patched one.
Rule out the cheap causes first. Many of these trucks have no transmission dipstick, so the level has to be checked at the overflow plug at the specified fluid temperature, and a unit that is a quart low will slip under load. Read codes and live data next. Toyota uses different names for the same A750 solenoid in its repair manual, parts catalog and scan data, so a code like P0986 for the SSE solenoid actually points at the part the repair manual calls SR. If the fluid is right, the solenoids test good and the truck still slips, the clutches are worn. Our Aisin harsh and delayed shift walkthrough separates valve body faults from clutch wear, and if you are still deciding whether to rebuild, read rebuild vs replace vs reman first.
This kit is listed for the Toyota Tacoma 2005-2014, Tundra 2005-2014, 4Runner 2003-2008 and Sequoia 2005-2008, and the same A750-family unit is used in the FJ Cruiser, Land Cruiser Prado and Lexus GX470. It cross-references TB-50LS, T117004AP, T117004A and 2443BNK. The A750 saw running changes across those years, so compare clutch plate counts and seal sizes against your old parts during teardown, match the number stamped on your unit, or send us your year and VIN before ordering. It does not fit the six-speed A760 or AB60 units used in later Tundra and Sequoia models. Browse the rest of our Aisin parts and rebuild kits for matching pieces.
A kit like this covers soft parts only, so the filter is not included. Inspect every drum for scoring and cracked lugs, check bushings and the pump for wear, and replace anything marginal; a damaged A750E input drum will eat new frictions quickly. Soak the frictions in Toyota WS fluid before assembly, set each pack clearance to the factory specification and air-check the circuits. Many builders install an A750 shift kit at the same time, since worn TCC relay and solenoid modulator valve bores in the valve body cause lockup and shift complaints that new clutches alone will not cure. Refill with Toyota WS only, level it hot at the overflow plug, and reset adaptive learning before the first drive.
| Type | Master rebuild kit: overhaul gasket and seal set, friction plates, steel plates |
| Transmission | Aisin A750E (RWD) / A750F (4WD) 5-speed automatic |
| Fitment | Toyota Tacoma 2005-2014, Tundra 2005-2014, 4Runner 2003-2008, Sequoia 2005-2008 |
| Replaces | TB-50LS, T117004AP, T117004A, 2443BNK |
| Kit weight | 6.07 lb |
| Package size | 15.75 x 9.45 x 3.94 in |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
It is listed for the 2005-2014 Tacoma with the A750E or A750F five-speed automatic. Confirm the number stamped on your unit or send us your VIN, since the A750 had running changes over those years.
Yes. The A750E (rear-wheel drive) and A750F (four-wheel drive) share the same main gearbox internals covered by this kit; the 4WD version differs at the rear housing and transfer case.
Friction plates, steel reaction plates, the overhaul gasket set, and the rubber seals, sealing rings and O-rings for the drums, pump and case. A filter is not listed, so order one separately.
Toyota WS (World Standard) ATF. Most of these trucks are filled and leveled at an overflow plug at a specified fluid temperature rather than with a dipstick.
Shudder at light throttle is usually converter lockup. Worn valve body bores and a worn converter clutch can both cause it, so service the converter and inspect the valve body along with the rebuild.
