400 Commonwealth Drive, Warrendale, PA 15096-0001 U.S.A. Tel: (724) 776-4841 Fax: (724) 776-5760 Web: www.sae.org SAE TECHNICAL PAPER SERIES 2003-01-0595 Toyota’s New Five-Speed Automatic Transmission A750E/A750F for RWD Vehicles Kazutoshi Nozaki, Yuuji Kashihara, Nobuaki Takah ashi and Akira Hoshino Toyota Motor Corp. Atsushi Mori and Hiroyuki Tsukamoto Aisin AW Co.,Ltd. Reprinted From: Transmission & Driveline System s Symposium 2003 (SP-1760) 2003 SAE World Congress Detroit, Michigan March 3-6, 2003Downloaded from SAE International by University of Alberta Libraries, Tuesday, November 27, 2018All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise,without the prior written permission of SAE. For permission and licensing requests contact: SAE Permissions 400 Commonwealth DriveWarrendale, PA 15096-0001-USAEmail: [email protected]: 724-772-4891Tel: 724-772-4028 For multiple print copies contact: SAE Customer ServiceTel: 877-606-7323 (inside USA and Canada)Tel: 724-776-4970 (outside USA)Fax: 724-776-1615Email: Customer [email protected] ISSN 0148-7191Copyright © 2003 SAE International 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 pap er if it is publishe d in SAE Transactions. Persons wishing to submit papers to be considered for presentation or publication by SAE should send themanuscript or a 300 word abstract of a proposed manuscript to: Secretary, Engineering Meetings Board, SAE. Printed in USADownloaded from SAE International by University of Alberta Libraries, Tuesday, November 27, 20182003-01-0595 Toyota’s New Five-Speed Automatic Transmission A750E/A750F for RWD Vehicles Kazutoshi Nozaki, Yuuji Kashihara, Nobuaki Takahashi and Akira Hoshino Toyota Motor Corp. Atsushi Mori and Hiroyuki Tsukamoto Aisin AW Co.,Ltd. Copyright © 2003 SAE International ABSTRACT Toyota Motor Corporation has developed a new five- speed automatic transmission (A750E/A750F) for longitudinal front engine rear wheel drive (RWD) vehicles. The development of this transmission has been aimed at improving fuel economy and power performance, achieving the world's top-le vel weight and compactness, while maintaining high torque capacity. In order to achieve this purpose, the gear train, torque converter, and other components are completely changed, and advanced technology has been applied. Mo reover, this automatic transmission has achieved high-quality shift feel and quiet performance. This paper describes the major features and performance of this transmission in detail. INTRODUCTION Environmental and energy efforts, such as reducing carbon dioxide to prevent gl obal warming, are important activities for the world in the new millennium. Thus, it is a natural mission for the automaker to improve fuel efficiency with new technology, while maintaining power, driveability, and NVH charac teristics demanded by the customer. With this mission, we have developed a new five-speed automatic transmission for RWD vehicles. This automatic transmission has been developed to perform under severe conditions required in a SUV, while maintaining the refinement deserving of a luxury vehicle. DEVELOPMENT OBJECTIVES The development goals for the automatic transmission are as follows. 1. Improved power performance 2. Fuel Economy 3. A total package that reduces weight, increases compactness, and improves rigidity 4. Smooth shift feel 5. Improved quietness GENERAL CONSTRUCTION This section will look at t he basic construction of the A750E/A750F. Figures 1 and 2 depict the cross section and gear train schematic respectively, and T