General System Description

GENERAL DESCRIPTION
The A340E automatic transmission is a 4-speed electronically controlled transmission with an intelligent control like the A341 E automatic transmission used in the LS400. The A340E automatic transmission has the following features.
- When shifting the transmission, the engine torque and the clutch hydraulic pressure in the transmission are 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 shift characteristics and prevents deterioration in the ATF over time.

HINT: For the A340E automatic transmission, use ATF TYPE T-IV. (TSB - T003-99 5/21/99)

- A super flow torque converter is used to improve the transmission efficiency.
The A340E automatic transmission is mainly composed of the torque converter clutch with lock -up mechanism, 4-speed planetary gear unit, the hydraulic control system and the electronically control system.
To minimize the possibility of incorrect operation of the automatic transmission, a shift lock mechanism has also been added.