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. AT-2 –AUTOMATICTRANSAXLEDescription 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 –AUTOMATICTRANSAXLEDescription AT-3 OPERATION Mechanical Operation OPERATING CONDITIONS AT-4 –AUTOMATICTRANSAXLEOperation Rear Planetary Carrier FUNCTION OF COMPONENTS NOMENCLATUREOPERATION Forward ClutchC1Connects input shaft and front planetary ring gear Direct ClutchC2Connects input shaft and front & rear planetary sun gear 2nd Coast BrakeB1Prevents front & rear planetary sun gear from turning either clockwise or counterclockwise 2nd BrakeB2Prevents outer race of F from turning either clockwise or counterclockwise, thus preventing front & rear planetary sun gear from turning counterclockwise 1st & Reverse BrakeB3Prevents rear planetary carrier from turning either clockwise or counterclockwise No. 1 One–Way Clutch F1When B is operating, prevents front & rear planetary sun gear from turning counterclockwise No.2 One–Way Clutch F2Prevents rear planetary carrier from turning counterclockwise O/D Direct ClutchC0Connects overdrive sun gear and overdrive planetary carrier O/D BrakeB0Prevents overdrive sun gear from turning either clockwise or counterclockwise O/D One–Way ClutchF0When transmission is being driven by engine, connects overdrive sun gear and over- drive carrier Planetary GearsThese gears change the route through which driving force is transmitted in accordance with the operation of each clutch and brake in order to increase or reduce the input and output speed –AUTOMATICTRANSAXLEOperation AT-5 。。。。。。