790018 Chrysler's NewFrontWheel DriveAutomatic Transmission DugaldCameron andAlfredP.Blomquist ChryslerCorp. CongressandExposition CoboHall,Detroit February26-March 2,1979 Downloaded from SAE International by North Carolina State Univ, Tuesday, September 18, 2018Theappearance ofthecodeatthebottomofthefirstpageofthispaperindicates SAE'sconsentthatcopiesofthepapermaybemadeforpersonalorInternaluse,or forthepersonalorinternaluseofspecificclients.Thisconsentisgivenonthecon dition,however,thatthecopierpaythestatedperarticlecopyfeethroughthe Copyright Clearance Center,Inc.,Operations Center,P.O.Box765,Schenectady, N.Y.12301,forcopyingbeyondthatpermitted bySections 107or108oftheU.S. Copyright Law.Thisconsentdoesnotextendtootherkindsofcopyingsuchas copyingforgeneraldistribution, foradvertising orpromotional purposes, for creatingnewcollective works,orforresale. Paperspublished priorto1978mayalsobecopiedataperpaperfeeof$2.50 undertheabovestatedconditions. SAEroutinelystocksprintedpapersforaperiodofthreeyearsfollowingdateof publication. DirectyourorderstoSAEOrderDepartment. Toobtainquantityreprintrates,permission toreprintatechnical paperorper missiontousecopyrighted SAEpublications inotherworks,contacttheSAE Publications Division. ISSN0148-7191 Copyright ©1979SocietyofAutomotive Engineers, Inc. Downloaded from SAE International by North Carolina State Univ, Tuesday, September 18, 2018790018 Chrysler's NewFrontWheel DriveAutomatic Transmission DugaldCameron andAlfredP.Blomquist ChryslerCorp. THISPAPERdescribes therequirements of thedesignanddevelopment ofanewautomatic transmission fortransverse engine"East-West" poweredvehicles. Withtheadventoflegislated fuelecon omythetrendtowardsmaller andlightercars hasbeenaccelerated. Thischangehascaused theautomotive industry totakeafreshlook atthewholecarandinparticular, engines andtransmissions asrelatedtotheirappli cationtomaintain acceptable performance levels,fueleconomyrequirements andstill provide thecustomer withanadequateinter iorspace. Theserestraints havedemanded maximumutilization ofspaceandfromthisis emerging anewbreedoffrontwheeldrive vehicles. Duringtheearlyvehicle designstages various arrangements offrontwheeldrive powerplants wereexamined. Thearrangement showninFigure 1wasselected foritsover allflexibility providing:1.Easeofadaptating todifferent engines andvehicles.2.Awiderangeofoverall topgear ratios.3.Easyremoval fromvehicle for service.4.Compactsizeandweight. Overall length389mm. In-carweight71.7Kgincludes, converter driveplate,fasteners andoilfill. Themodelyeartimingfortheintroduc tionofthenew"Omni-Horizon" carline created anadditional challenge: todesign, develop andtoolthenewautomatic transmis sioninathreeyeartimeframe. Sincetime wasoftheessenceitwasdecided thatthe designwouldbeconfined toconventional construction, butwherepossible, makeprovi sionfortheincorporation oftheever-growing engineered stamping technology atalaterdate. Theobjectives forthedesignwere: .Provideatleastthreeforward speeds. .Havecapacity andflexibility to handleanenginerangefrom1.4liter to2.6liter. .Provide agoodrangeofoverall top gearratioswithminimummanufacturing complexities. .DesigntoMetricStandards -Thenew "Omni-Horizon" carlinewasdesigned metricandrepresented agiantstep fortheCorporation initsprevious commitment tometricchangeover. ABSTRACT Anewthree-speed automatic transmission hasbeendesigned, developed andisbeingpro ducedintheU.S.bytheChrysler Corporation foritsnewfamilyoffrontwheeldriveveh icles. Thetransmission wasdesigned around theChrysler-proven TorqueFlite concept. Thefeatures ofthenewtransmission include a"folded" construction forinstallation ina transverse powertrain. Thecaseisaone piecealuminumdiecasthousingandcontains thefinaldriveanddifferential unit. Thispaperdescribes thedesignanddev elopment ofthisnewautomatic transmission. 0148-7191/79/0226-0018902.50 Copyright ©1979SocietyofAutomotive Engineers, Inc. Downloaded from SAE International by North Carolina State Univ, Tuesday, Septembe