400 Commonwealth Drive, Warrendale, PA 15096-0001 U.S.A. Tel: (724) 776-4841 Fax: (724) 776-0790 Web: www.sae.org SAE TECHNICAL PAPER SERIES 2007-01-1097 62TE 6-Speed Transaxle for Chrysler Group Berthold Martin, Hussein Dourra, Charles Redinger, Mark Champine, Fred Goedtel, Gary Lowe and Steve Barrer DaimlerChrysler AG Reprinted From: Tr ansmissions & Drivelines (SP-2134) 2007 World Congress Detroit, Michigan April 16-19, 2007 Downloaded from SAE International by Univ of California Berkeley, Thursday, August 02, 2018By mandate of the Engin eering Meetings Board, th is paper has been approved for SAE publication upon completion of a peer review process by a minimum of three (3) industry experts under the supervision of the session organizer. All 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]: 724-776-3036Tel: 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: 724-776-0790Email: Customer [email protected] ISSN 0148-7191Copyright © 2007 SAE InternationalPositions 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 Univ of California Berkeley, Thursday, August 02, 2018 1Copyright © 2007 SAE International ABSTRACT A new six-speed transaxle has been introduced by the Chrysler Group of DaimlerChrysler AG. Along with the six forward ratios in the normal upshift sequence, this transaxle features a seventh forward ratio used primarily in a specific downshift sequence. A significant technical challenge in this design was the control of so-called double-swap shifts, the exchange of two shift elements for two other shift elements. In the case at hand, one of the elements is a freewheel. A unique solution is discussed for successful control of double-swap shifts. The new design replaces a four-speed transaxle but makes use of a large percentage of parts and processes from the four-speed design. This approach enabled the new transaxle to reach production in three years from concept. The new transaxle, referred to as the 62TE, has substantially improved performance and passing maneuvers coupled with a new 4.0L high output engine for which the 62TE was developed. INTRODUCTION The four-speed 41TE used in Chrysler Group FWD vehicles was the domestic aut o industry’s first transaxle with fully electronic controls [1, 2] and along with its RWD variant 42RLE remains an industry benchmark for simplicity in construction and e fficiency in assembly [3]. The 62TE is based on this arch itecture. It shares 39% of parts and 22% of manufacturing processes with the 41TE and 42RLE. In its concept and in its first application the 62TE was designed for use with a new 4.0L high output engine (Figure 1a) to meet specific requirements. The following performance and fuel economy targets were set by comparison to the same vehicle, the premium Pacifica crossover powered by the 3.5L engine and 41TE 4-speed transaxle: ƒ 10% improvement in 40-60 mph (64-97 kph) passing maneuver time. ƒ 7% improvement in 0-60 mph (0-97 kph) time. ƒ 5% improvement in 5-second distance ƒ No deterioration in fuel economy at these improved performance