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Reverse input fluid closes the normally open reverse

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Reverse input fluid closes the normally open reverse fluid pres-sure switch in the pressure switch assembly (PSA).The PSAsignals the PCM that the manual valve is in the Reverse position.Pressure RegulationThe pressure control solenoid continues to regulate actuator feedlimit (AFL) fluid into the torque signal fluid circuit in relation tothrottle position and other vehicle operating conditions.Torque signal fluid pressure continues to act on the boost valveto control line pressure.Also, reverse input fluid pressures actson the boost valve to assist torque signal fluid pressure force andincrease the operating range of line pressure.Note:The hydraulic and electrical systems in Reverse operatein the same manner as Park (P) range except as describedabove.In each of the following gear ranges, most of the expla-nation is limited to what changes from the range on the previ-ous page.If a component or circuit is not explained, it func-tions similar to the previous range.However, some explana-tions are repeated for clarity and continuity.COMPLETE HYDRAULIC CIRCUITPage 70EXMANUAL VALVE3-4 SHIFT VALVELO OVERRUNACTUATOR FEED LIMITPRESSURECONTROLSOLENOIDBOOST VALVEPRESS REG2-3 SHUTTLE2-3 SHIFT VALVE1-2 SHIFT VALVE252623SOL AN.O.ONLINELINED4REVERSEPRD3D2LOPRD2D3D3LOD4D4FWD CL FEEDLO27PRPRREV INPUTLO/REVLO/1STD4TORQUE SIGD3EXEXEXEXEXEX2829EXEXEXEXAFLD4-3-2D2ORUNAFLD33-4 ACC2ND2NDAFLSIG AAFL3-4 SIGTORQUE SIGLINEPRLO/REVREV INPUTAFLAFLPRCONV FDDECREASELINELINEEXFILTER (50)3210EXLINEPRESSURETAPFILTER(49)SOL BN.O.ONEXEXPRND321D2-N.C.REV-N.O.D3-N.C.LO-N.O.D4-N.O.TEMPSENSORPRESSURESWITCHASSEMBLYEXEX#10Figure 4245REVERSE3-4 SIGAFLLO/REVPRSIG A4TH SIGSERVO FEEDTORQUE SIGLO & REVERSECLUTCH ASSEMBLYREVERSE INPUTCLUTCH ASSEMBLYREV ABUSE#317EXREVREV INPUTREVREVREV INPUTREV INPUTREV INPUTLINE (From Pump)FORWARD CLUTCHACCUMULATORAFL (To 3-2 Solenoid)
46ANEUTRALEngine RunningPower flow in Neutral is the same as in Park range.The turbine shaft and input housing assembly (621) are driven atconverter turbine speed.All clutch packs in the input housing assembly are released andpower flow is terminated at the input housing.Lo and Reverse Clutch ReleasedUnlike Park range, the lo and reverse clutch plates (682) arereleased in Neutral.However, this does not affect the mechani-cal power flow.Parking Lock Pawl DisengagedThe parking lock actuator (85) is disengaged from the parkingbrake pawl (81).

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Term
Spring
Professor
ThomasJ.Karsky
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