SA E TECHNICAL PAPER SERIES Wet Clutch Performance in a Mineral-Based, and in a Partial-Synthetic-Based Automatic Transmission Fluid Biilent Cavdar and Robert C. Lam Borg Warner Automotive Reprinted from: 1997 Transmission and Driveline Systems Symposium: Transmission Systems, Components, Gears and Friction and Fluid Materials (SP-1241) LIBRARY The Engineering Society -*=For Advancing Mobility and Sea Air and Space, International Congress & Exposition Detroit, Michigan February 24-27,1997 -- -- - 400 Commonwealth Drive, Warrendale, PA 15096-0001 U.S.A. Tel: (412)776-4841 Fax:(412)776-5760 Downloaded from SAE International by University of New South Wales, Saturday, September 15, 2018The appearance of the 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 ofspecificclients. Thisconsent is given on thecondiiion however, that thecopier pay a $7.00per article copyfeethrough the Copyright Clearance Center, Inc. Operations Center, 222 Rosewood Drive, Danvers, MA 01 923 for copying beyondthat permitted by Sections 107or 108 of the U.S. Copyright Law. This consent does not extend to other kinds of copyingsuch ascopying for general distribution, foradvertising or promotional purposes, forcreating 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 ratescan beobtained frornthe Customer Sales and Satisfaction Depart- ment. To request permission to reprint atechnical paper or permission to use copyrighted SAE publications in otherworks, contact the SAE PublicationsGroup. All SAEpapers, standards, and selected booksm~ctedandindavedintheSAE GloWMobilityDatabase. No part of this publication may by reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher. ISSNO148-7191 Copyright 1997Societyof Automotive Engineers, Inc. Positions and opinions advanced in this paperarethoseofthe author(s) and not necessarily those of SAE. The author issolely responsible forthecontent of the paper. A process is available by which discussions will be printed with the paper if it is published in SAE Transactions. For permission to publish this paper in full or in part, contact the SAE *, - ,- Publieations Group. Persons wishingtosubmlpapers to beconsidered for presentation or publication through SAE should send the manuscript or a 300 word abstract of a proposed manuscript to: Secretary, Engineering Meetings Board, SAE. Printed in USA Downloaded from SAE International by University of New South Wales, Saturday, September 15, 2018Wet Clutch Performance in a Mineral-Based, and in a Partial-Synthetic-Based Automatic Transmission Fluid Biilent Cavdar* and Robert C. Lam Borg Warner Automotive Copyright 1997 Society of Automotive Engineers, inc. ABSTRACT The physical and chemical properties of a mineral-based (Fluid-M) and a partial-synthetic-based (Fluid-PS) automatic transmission fluid were compared by the analyses of Gel Permeation Chromatography (GPC), Thermogravimetry (TG), Fourier Transform Infrared Spectroscopy (FTIR), Nuclear Magnetic Resonance (NMR), Gas Chromatography (GC), viscometry, thermo-oxidative stability, torque response curve shape and metal-to-metal wear preventive characteristics. The effects of various properties of Fluid- M and Fluid-PS on wet friction material performance were investigated from the viewpoints of compressibility, durability, tensile strength, surface interactions and friction-pressure-speed-temperature characteristics. Friction material specifications for partial-synthetic fluid applications will be different from those for mineral-based fluid applications. GPC showed that Fluid-PS has a higher concentration and a lower molecular weight of VI Improv