AUTOMATIC TRANSAXLE
A540E
AT-1
DESCRIPTION
The A540E automatic transaxle is a 4–speed, Electronic Controlled Transaxle (hereafter called ECT) developed
exclusively for use with the high output 2VZ–FE engine.
This transaxle features the following points:
Torque control system has been adopted, which retards the ignition timing and reduces shift shock
during up and down–shift.
N to D squat control system has been adopted to reduce the shock when the transaxle is shifted to
the D range from the N range.
Engine and ECT ECU has been adopted, which incorporates the Engine Control Computer and
Transaxle Control Computer.
Fail–safe system has been adopted, which permits safe driving even when the electrical circuitry
malfunctions.
On–board diagnosis system has been adopted, which causes the O/D (overdrive) OFF indicator light
to blink, informing the driver of the location of malfunction.
The A540E automatic transaxle is mainly composed of the torque converter with lock–up clutch, the 4–speed
planetary gear unit, the differential, the hydraulic control system and the electronic control system.
Also, to minimize the possibility of incorrect operation of the automatic transaxle, a shift lock mechanism has
been added.
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General Specifications
Type of Transmission
Type of Engine
Torque Converter
Gear Ratio
Counter Gear Ratio
Differential Gear Reduction Ratio
Number of Discs and Plates
(Disc/Plate)
2nd Coast Brake (B1) Band Widthmm (in.)
Number of Sprags
Front Planetary Gear
Rear Planetary Gear
O/D Planetary Gear
ATF
–AUTOMATIC TRANSAXLEDescription
AT-3
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