4l60e-变速箱维修手册-shift-conversion

TRANSMISSION THERAPYTurning a 4L60Einto a Manuallyby Larry FrashShifted Transfew months ago,FORWARD CLUTCHI received a callACCUMULATORonthe ATRAMANUAL VALVETechnical HelpLine from atechnician wanting to builda manually shifted 4L60E.FWD CL FEEDAfter a careful examina-tion of the hydraulic sche-matics and a valve body,Irealized this modificationwould require a lot moreeffort than I originallythought.It was possible,REV INPUTbut I needed more time.FWD CL FEEDAfter several more callsrequesting the same thing,I took this project andPluggedSolenoid Amade it a priority.feedAnd why not?Thetrend in drag racing andFlat Spot Groundstreet machines is movingon land 1toward overdrive transmis-sions anyway.There areSHIFT VALVseveral benefits,such asHole 22busing a 4.88:1 ratio in thePluggedFittingdifferential and still beingAdaptorOVERRUN CL FOsomewhat driveable on theAFLfreeway.2N0When I finished myAFLPluggedresearch I had to look for0432Solenoid B-3 SHUTTLEfeeda hotrod to test the valvebody modifications.Butwhere could I find one?As0.270"shimI was driving the ATRAOVERRUN CLLOVERRUN CL FDshop truck,looking for a4 ACCtest vehicle,I suddenlyrealized I was driving aStem Ground 0.2701994 Chevy Silverado4TH SIGwith a 4L60E.So I hadMike Van Dyke here atATRA machine a tubingadapter,and I did someFigure 1 Manual Low4GEARS May/June 2006