The A340E transmission is a 4-speed automatic transmission found in the Toyota 4Runner, Sequoia, Tacoma, and 4Runner. A340E transmission common failure include loss of 4th gear, loss of reverse, overheating, and erratic shifting. Raybestos Powertrain offers several aftermarket A340E transmission solutions that include the use of Stage-1 friction material to increase clutch life and durability in high-stress driven vehicles.