400 Commonwealth Drive, Warrendale, PA 15096-0001 U.S.A. Tel: (724) 776-4841 Fax: (724) 776-5760 SAE TECHNICAL PAPER SERIES 2000-01-1147 Toyota’s U340E Four-s peed Automatic Transaxle Masaru Morise, Masafumi Kinosita, Masaharu Tanaka and Katsumi Kouno Toyota Motor Corp. Reprinted From: Transmission and Driveline S ymposium 2000 (SP–1522) SAE 2000 World Con gress Detroit, Michi gan March 6–9, 2000Downloaded from SAE International by University of British Columbia, Thursday, August 02, 2018The appearance of this ISSN code at the bottom of this page indicates SAE’s consent that copies of the paper may be made for personal or internal use of specific clients. This consent is given on the condition,however, that the copier pay a $7.00 per article copy fee through the Copyright Clearance Center, Inc.Operations Center, 222 Rosewood Drive, Danvers, MA 01923 for copying beyond that permitted by Sec-tions 107 or 108 of the U.S. Copyright Law. This consent does not extend to other kinds of copying such ascopying for general distribution, for advertising or promotional purposes, for creating new collective works,or for resale. SAE routinely stocks printed papers for a period of three years following date of publication. Direct your orders to SAE Customer Sales and Satisfaction Department. Quantity reprint rates can be obtained from the Customer Sales and Satisfaction Department.To request permission to reprint a technical paper or permission to use copyrighted SAE publications in other works, contact the SAE Publications Group. No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior wr itten permission of the publisher. ISSN 0148-7191 Copyright © 2000 Society of Automotive Engineers, Inc. Positions and opinions advanced in this paper are those of the author(s) and not necessarily those of SAE. The author is solely responsible for the content of the paper. A process is available by which discussions will be printed with the paper if it is p ublished in SAE Transactions. For permission to publish this paper in full or in part, contact the SAE Publications Group. Persons wishing to submit papers to be considered for presentation or publication through SAE should send the manuscript or a 3 00 word abstract of a proposed manuscript to: Secretary, Engineering Meetings Board, SAE. Printed in USAAll SAE papers, standards, and selected books are abstracted and indexed in the Global Mobility DatabaseDownloaded from SAE International by University of British Columbia, Thursday, August 02, 20181 2000-01-1147 Toyota’s U340E Four-speed Automatic Transaxle Masaru Morise, Masafumi Kinosita, Masaharu Tanaka and Katsumi Kouno Toyota Motor Corp. Copyright © 2000 Societ y of Automotive En gineers, Inc. ABSTRACT TOYOTA has desi gned a new famil y of automatic transaxles named the “Super ECT ”. These are the next generation of automatic transaxles (AT), for FWD passenger cars. The aim of this development was compactness, li ghtness, and improvements in fuel economy and shift quality. There are several kinds of transaxles included in this group to match each of the FWD passen ger cars and en gines. The “U340E,” a four- speed automatic transaxle, has been developed as one member of this famil y. This is one of the most compact and light AT in its class, and has greatly contributed to the fuel econom y of vehicles. This paper will give an overview of the “ Super ECT ” and the major features and performance of the U340E. INTRODUCTION A further reduction of carbon dioxide emissions is nowre quired to help with the environmental issue of global warming. Because of this, the importance of a vehicle ’s fuel econom y is increased. This means that a vehicle with an internal combustion en gine requires improvements in the followin g areas: the combustion efficiency of the en gine, the efficienc y of the drivetrain, and the compactness and li ghtness of a vehicle. Based on these re quirements, the eff