Automatic Transmission/Transaxle: Description and Operation

GENERAL DESCRIPTION
The A341E automatic transmission is a 4-speed Electronically Controlled Transmission with intelligent control developed exclusively for the Lexus LS400. The A341E automatic transmission has the following features.
- When shifting the transmission, the engine torque is controlled and the clutch hydraulic pressure in the transmission is electronically controlled to reduce transmission shift shock.
- A new type of ATF Type T-IV (TSB - T003-99 5/21/99) is used which provides improved shifting characteristics and prevents deterioration in the ATF over time.

HINT:For the A341E automatic transmission, use ATF Type T-IV (TSB - T003-99 5/21/99).

- A super flow torque converter clutch is used to improve the transmission efficiency.
The A341E automatic transmission is mainly composed of the torque converter clutch with lock-up clutch, 4-speed planetary gear unit, the hydraulic control system and the electronic control system. To minimize the possibility of incorrect operation of the automatic transmission, a shift lock mechanism has also been adopted.