A750E A750F Master Rebuild Kit Toyota Tundra Tacoma 4Runner

This is the master kit for a complete A750E and A750F rebuild. The A750E (rear-wheel drive) and A750F (four-wheel drive) are Aisin five-speed longitudinal automatics used behind Toyota and Lexus RWD trucks and SUVs. It fits the Tacoma 2005-2014, Tundra 2005-2014, 4Runner 2003-2008 and Sequoia 2005-2008, and the same A750-family unit also lives in the FJ Cruiser, Land Cruiser Prado and Lexus GX470.

Inside you get the friction (clutch) plates, steel reaction plates, the full overhaul gasket set, and the rubber seals, sealing rings and O-rings needed to reseal the drums, pump and case. These are the wear parts you swap on a normal rebuild once the hard parts check out, so you are not putting worn frictions or brittle seals back in.

Rebuild this unit when it slips in a gear, engages late or harsh out of Park or Reverse, shudders on torque-converter lockup, or shows dark, burnt fluid. Those are the symptoms the frictions, steels and seals in this kit address. It cross-references OE numbers TB-50LS, T117004AP, T117004A and 2443BNK -- match the number stamped on your unit before ordering.