General

A: OUTLINE
This automatic transmission utilizes a microcomputer for accurate control of the vehicle speed, engine brake operation, lock-up operation, gear shift timing and others. It corresponds to the throttle opening, actual vehicle speed, engine rpm and range position signal.
This system is designed as on electronically controlled full-time AWD system and has a transfer hydraulic pressure control unit incorporating duty solenoid and a multi-plate transfer (MPT) consisting of a wet type multi-plate clutch on the rear of the automatic transmission section.
The control unit stores optimum transfer clutch torque (duty ratio) data for various driving conditions. When actual driving conditions (vehicle speed, throttle opening, gear range, wheel slip, etc.) are detected by various sensors, the control unit selects the most suitable duty ratio from memory, and controls the transmitting torque of the transfer clutch by means of the hydraulic pressure controlling duty solenoid.

B:FEATURES
^ A one-way clutch and three accumulators are used to reduce gear shift shock and gear select shock, and a fully electronic control system is employed for accurate gearshift control from 1st to 4th speed, hydraulic oil pressure (line pressure), lock-up operation, etc.
^ A hydraulic lock-up type torque converter clutch, variable delivery oil pump, gear train with two sets of simple planetary gears (permitting four forward and one reverse stage) are used to improve driving dynamics and fuel consumption.
^ A push-pull cable featuring less vibration to the high rigid transmission case and control unit is used for improved quietness during driving.
^ On-board diagnostics function and fail-safe function are incorporated for improved serviceability and reliability.
^ The transfer clutch capacity can be accurately controlled by means of the electronic control system. This is especially effective for eliminating tight corner braking phenomenon which occurs at low speeds, thereby achieving smooth driving.
^ An optimum rear wheel drive distribution is achieved which corresponds to engine output and gear shift position and improves fuel consumption and steering stability.
^ For the car equipped with ABS, the braking performance is improved by the control of the clutch and gear locking at a particular shift position through ABS operation-time control.
^ Driveability and comfort are improved with the use of manual range.





C: CROSS SECTIONAL VIEW