SAE TECHNICAL PAPER SERIES 982673 Shear Stability of Automatic Transmission Fluids -- Methods and Analysis A Study by the International Lubricants Standardization and Approval Committee (ILSAC) ATF Subcommittee Joseph W. Spry!; Nobuyoshi Hoshikawa James L. Linden Ford Motor Company Fuji Heavy Industry Co. General Motors Jyunichi Doi Mazada Motor Co.Tracey King Chrysler CorporationYasuhiro Murakami Mitsubishi Motors Mitsumasa Furumoto Hideo Kurashina Honda Research and Development Co.Mitsubishi Motors Corp.Fumio Ueda Toyota Motor Company Reprinted From: Automatic Transmission Fluids (ATF) (SP-1394) mA E The Engineering Society For Advancing Mobility Land Sea Air and Space, INTERNATIONALInternational Fall Fuels and Lubricants Meeting and Exposition San Francisco, California October 19.22,1998 400 Commonwealth Drive, Warrendale, PA 15096-0001 U.S.A. Tel: (724) 776-4841 Fax: (724) 776-5760Downloaded from SAE International by Imperial College London, Thursday, August 09, 2018rneappe- ofthelSSNcodeatthebottomofttrispageindicatesS~scMIsentthat copiesafthepapetmaybemadefotpersonalorintemaluseofspecificclients.This~~ isgiven onthecondiion howe~r,thatthecopierpaya$7.OOperarticlecopyfeethrough theCopy@htClearanceCenter, Inc. OperationsCenter, Rosewood Drive, Danvers, MA01923forcopyingbeyondthatpermittedbySecWns107or103oftheU.S.Copyright LOW. Thisconsentdoesnotextendtootherkindsofcopyingsuchascopyingforgeneral disbibution,foradvertisingorpromotiona!purposes,forcreatingnewcoktiveworks,or for retie. SAEi routinely stocks printed papers for a period of three years following date of publication. Direct yourordersto SAE CustomerSalesand Satisfaction Department. QuanWyreprintratescanbeobtainedfromtheCustomerSalesandSatisfaction Depart- ment To request permission to reprint atechnical paper or permission to use copyrighted SAE publications in other works, contactthe SAE Publications Group. GLOBAL MOBfUWDAT~E All SAE papers, s?anda&, and selected twb~absb’adedandndindexedin#eSAEGlobalmiD Nopartofthispubkationmaybyreproducedinanyform,inanelectronicretrievakystem or otherwise, without the priorwritten permission of the pubiiiher. Copyright 1998 Society of Automotive Engineers, Inc. P~c)nsandopinionsadvancedinthispaperare~of~~or(s)aradnot~ those of SAE The author is solely responsible forthe content 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 PublicationsGroup. Personswishingtosubmitpaperstobeconsideredforpmsentationorpublicationthrough SAE should send the manuscript ora 300 word abstract of a proposed manuscript to: Secretary, Engineering Meetings Board, SAE. Printed in USA 90-I 203BIPGDownloaded from SAE International by Imperial College London, Thursday, August 09, 2018982673 Shear Stability o.f Automatic Transmission Fluids -- Methods and Analysis A Study by the International Lubricants Standardization and Approval Committee (ILSAC) ATF Subcommittee Joseph W. Sprys Ford Motor Company Jyunichi Doi Mazda Motors Company Mitsumasa Furumoto Honda Research and Development Company Nobuyoshi Hoshikawa Fuji Heavy Industry Company Tracey King Chrysler Corporation Copyright 0 1998 Society of Automotive Engineers, Inc. ABSTRACT This paper discusses four methods for measuring the resistance of transmission fluids to permanent viscosity loss through shear. The four methods include the Fuel Injector Shear Stability test, the Sonic shear test, the DEXRONB-III Cycling test and the KRL test. Each of these methods and their advantages are discussed and data provided for many OEM fluids and the effects of these methods on the final viscosity. The data indicates the KRL generates the maximum shear stress on the fluids compared to the other methods. The data also indicates the sonic shear method results are similar tothose of the KRL test.