A760E And A760F Automatic

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108TOYOTA TUNDRA – NEW FEATURESJA760E AND A760F AUTOMATIC TRANSMISSIONS1. DescriptionD An A760E 6-speed Super Electronic Controlled Transmission (Super ECT) is used on the 2WD modelswith 1UR-FE engine.D An A760F 6-speed Super Electronic Controlled Transmission (Super ECT) is used on the 4WD modelswith 1UR-FE engine.D A tow/haul control is used on the models with towing package. This controls the engine throttle,transmission shift schedule and shift timing to ensure driveability when a trailer is being towed.12DCH001YA760E Automatic Transmission12DCH002YA760F Automatic Transmission

109TOYOTA TUNDRA – NEW FEATURES"Specifications ATransmission TypeA760EEngine Type1UR-FEGear 586Reverse3.224Fluid TypeFluid CapacityWeight (Reference)*Toyota Genuine ATF WSModels without Towing Package11.1 Liters (11.6 US qts, 9.7 Imp. qts)Models with Towing Package11.6 Liters (12.3 US qts, 10.2 Imp. qts)Models without Towing Package88.7 kg (195.1 lb)Models with Towing Package89.2 kg (196.2 lb)Transmission TypeA760FEngine TypeGear 66th0.586Reverse3.224Fluid TypeFluid CapacityWeight (Reference)*Toyota Genuine ATF WSModels without Towing Package10.8 Liters (11.4 US qts, 9.5 Imp. qts)Models with Towing Package11.3 Liters (11.9 US qts, 9.9 Imp. qts)Models without Towing Package90.5 kg (199.1 lb)Models with Towing Package90.9 kg (200.0 lb)*: Weight shows the figure with the fluid fully filled.

110TOYOTA TUNDRA – NEW FEATURESC2C3C1B3B1B2F3B4Rear Planetary GearInput ShaftCenter Planetary GearC4"F4F2F1Front Planetary Gear12DCH033YSpecifications AItemA760EA760FC1No. 1 Clutch5 C2No. 2 Clutch6 C3No. 3 Clutch5 C4No. 4 Clutch3 B1No. 1 Brake4 B2No. 2 Brake4 B3No. 3 Brake4 B4No. 4 Brake8 F1No. 1 1-way Clutch18 F2No. 2 1-way Clutch25 F3No. 3 1-way Clutch26 F4No. 4 1-way Clutch27 40 Inner22 Outer21 No. of Ring Gear Teeth91 No. of Sun Gear Teeth31 No. of Pinion Gear Teeth23 No. of Ring Gear Teeth77 No. of Sun Gear Teeth25 No. of Pinion Gear Teeth19 No. of Ring Gear Teeth63 No. of DiscsNo. of SpragsNo. of Sun Gear TeethFront Planetary GearCenter Planetary GearRear Planetary GearNo. of Pinion Gear Teeth

111TOYOTA TUNDRA – NEW FEATURES2. Torque ConverterA compact, lightweight and high-capacity torque converter is used. The torque converter supports flexlock-up clutch control, thus allowing for improved fuel economy.Pump ImpellerLock-up Clutch1-way ClutchStatorTurbine Runner"12DCH003YSpecifications ATransmission TypeTorque Converter TypeA760EA760F3-element, 1-step, 2-phase(with Lock-up Mechanism) 1.80 Stall Torque Ratio3. Oil PumpD The oil pump is driven by the torque converter. It lubricates the planetary gear units and supplies operatingfluid pressure for hydraulic control.D The pump cover is made of aluminum to reduce weight.Pump CoverDriven GearPump BodyStator ShaftDrive Gear232CH89

112TOYOTA TUNDRA – NEW FEATURES4. Oil StrainerA felt type oil strainer (in a plastic case) is used because it weighs less, offers excellent debris capturingability, and is more reliable. This oil strainer is maintenance-free.12DCH046IPlastic CaseFelt StrainerOil Pan

113TOYOTA TUNDRA – NEW FEATURES5. ATF Cooling SystemGeneralD These automatic transmissions use an ATF warmer that increases the rate at which the ATF warms up,and an ATF cooler that cools down the ATF.D The ATF warmer is provided as standard.D An air-cooled type ATF cooler integrated with the condenser is provided on the models with towingpackage."Models without ATF Cooler AEngineAutomaticTransmission: ATF flow: Engine coolant flowHeaterCoreATF Warmer"12DCH004IModels with ATF Cooler AEngineAutomaticTransmissionHeaterCore: ATF flow: Engine coolant ionATF WarmerTransmission Oil Thermostat12DCH005I

114TOYOTA TUNDRA – NEW FEATURESATF WarmerD The ATF warmer uses engine coolant to warm up the ATF quickly and keep the ATF temperature higher(within limits). Consequently, the friction losses of the automatic transmission are quickly reduced, thusimproving fuel economy.D Models with an ATF cooler have a transmission oil thermostat to switch the ATF passages.To Engine: Engine coolant flow: ATF flowFrom EngineTo AutomaticTransmissionATF WarmerFrom AutomaticTransmissionModels without ATF Cooler12DCH006YTo EngineFrom EngineATF WarmerTo AutomaticTransmissionFrom AutomaticTransmissionTransmission Oil ThermostatATF WarmerTo ATF CoolerFrom ATF CoolerModels with ATF Cooler12DCH007Y

115TOYOTA TUNDRA – NEW FEATURESTransmission Oil Thermostat (Models with Towing Package)The transmission oil thermostat consists of the poppet valve, bypass valve and element case (contains wax).When the ATF temperature changes from low to high, the wax will expand to start to open the poppet valveand close the bypass valve, thus switching the ATF passages.To AutomaticTransmissionElement Case(Contains Wax)From ATF CoolerPoppet Valve(Closed)From AutomaticTransmissionPoppet Valve(Open)To ATFCoolerBypass Valve (Closed)Bypass Valve (Open)ATF Temperature Low Condition12DCH008IATF Temperature High ConditionATF Cooler (Models with Towing Package)The air-cooled type ATF cooler integrated with the condenser is used to maintain ATF cooling performanceunder high loads.ATF Cooler PortionCondenserPortionCondenser Assembly12DCH009Y

116TOYOTA TUNDRA – NEW FEATURES6. ATF Filling ProcedureAn ATF filling procedure is used in order to improve the accuracy of the ATF level when the transmissionis being repaired or replaced. As a result, the oil filler tube and the oil level gauge used in the conventionalautomatic transmission have been discontinued, eliminating the need to inspect the fluid level as a part ofroutine maintenance.D This filling procedure uses a refill plug, an overflow plug, an ATF temperature sensor No. 2, and a Dindicator.Refill PlugProper LevelOverflow Plug12DCH035YService TipFor details about the ATF filling procedures, refer to the 2010 TOYOTA TUNDRA Repair Manual.

117TOYOTA TUNDRA – NEW FEATURES7. Planetary Gear UnitConstructionThe planetary gear unit consists of 3 planetary gear units, 4 clutches, 4 brakes, and 4 1-way clutches.D A centrifugal fluid pressure canceling mechanism is used in the C1, C2, C3, and C4 clutches applied whenshifting 2nd 3rd, 3rd 4th, 4th 5th, and 5th 6th. For details, see page 124.No. 3 Clutch (C3)No. 2 Clutch (C2)No. 1 Clutch (C1)No. 1 Brake (B1)No. 3 Brake (B3)No. 4 Brake (B4)No. 2 Brake (B2)Rear Planetary GearOutputShaftNo. 3 1-way Clutch (F3)Center Planetary GearNo. 1 1-wayNo. 4 Clutch (C4)Intermediate ShaftClutch (F1)No. 4 1-way Clutch (F4)Front Planetary GearNo. 2 1-way Clutch (F2)12DCH036YInput ShaftB3F2F1B1B2F3B4C3C2C1Output ShaftF4C4Input ShaftSun GearIntermediateShaftRear Planetary GearFront Planetary GearCenter Planetary Gear12DCH010Y

118TOYOTA TUNDRA – NEW FEATURESFunction of ComponentsComponentFunctionC1No. 1 ClutchConnects the input shaft, F4 and intermediate shaft.C2No. 2 ClutchConnects the input shaft and center planetary carrier.C3No. 3 ClutchConnects the input shaft and sun gear.C4No. 4 ClutchConnects the input shaft and intermediate shaft.B1No. 1 BrakePrevents the front planetary carrier from turning either clockwiseor counterclockwise.B2No. 2 BrakePrevents the front and the center ring gears from turning eitherclockwise or counterclockwise.B3No. 3 BrakePrevents the outer race of F2 from turning either clockwise orcounterclockwise.B4No. 4 BrakePrevents the center planetary carrier and rear ring gear from turningeither clockwise or counterclockwise.F1No. 1 1-way ClutchPrevents the front planetary carrier from turning counterclockwise.F2No. 2 1-way ClutchWhen B3 is operating, the 1-way clutch prevents the front sun gearfrom turning counterclockwise.F3No. 3 1-way ClutchPrevents the center planetary carrier and rear ring gear from turningcounterclockwise.F4No. 4 1-way ClutchPrevents the intermediate shaft from turning counterclockwise.Planetary GearThese gears change the route through which driving force istransmitted, in accordance with the operation of each clutch andbrake, in order to increase or reduce the output shaft speed.

119TOYOTA TUNDRA – NEW FEATURESTransmission Power FlowShiftPosition orShift RangeD,S6S5S4S3S2S1Shift Solenoid ValveS1S2S3S4 SR SL1ClutchSL2 SLU C1POn OnOnOnR*On OnOnOnNOn OnOnOnC2C3On OnOnOnOn On f6th*On OnOnFffOn OnOnOn2ndOn On OnOnOnOnf3rdOnOnOnOnf4th*OnOnOnOnfOnOn2ndOn On OnOnOn3rd*OnOnOnOn OnOn1st2nd*1st*On On On On OnOn OnffF2 ffFffOnfOnOnf: OperatesF: Operates but is not related to power transmission : Operates during engine braking*: Engine braking occursfffFffFfFf ffFfffFffFfffF ffFff fF fffFff f ff ffffffffffffOnF4ffOnF3ff1stOn OnF1fOn1stB4fOn OnOn On OnOnB3 F1stOnB2f2ndOnB11-way Clutchf1stOnC4f2ndOnBrakefffff

120TOYOTA TUNDRA – NEW FEATURES1) 1st Gear (Shift Lever is in D or S)B3F2F1B1F3B2B4C3C2C1F4C4: Operates: Operates during engine brakingC1C2C3fC4B112DCH011YB2B3 B4F1F2 F3F4fff: Operates : Operates during engine braking (S1 range)2) 2nd Gear (Shift Lever is in D or S)B3F2F1B2B1B4F3C3C2C1F4C4: Operates: Operates during engine brakingC1fC2C3C4 B112DCH012YB2B3 ff: Operates : Operates during engine braking (S2 range)B4F1F2ffF3F4f

121TOYOTA TUNDRA – NEW FEATURES3) 3rd Gear (Shift Lever is in D or S)B3F2F1B1B2F3B4C3C2C1F4C4: Operates: Operates during engine braking: Operates but is not related to power transmission12DCH013YC1C2fC3C4B1f B2B3B4F1FF2F3fF4ff: Operates : Operates during engine braking (S3 range)F: Operates but is not related to power transmission4) 4th Gear (Shift Lever is in D or S)B3F2F1B1B2F3B4C3C2C1F4C3: Operates: Operates during engine braking: Operates but is not related to power transmissionC1C2C3C4ffF B1B2f: Operates : Operates during engine brakingF: Operates but is not related to power transmissionB3F12DCH014YB4F1F2F3F4f

122TOYOTA TUNDRA – NEW FEATURES5) 5th Gear (Shift Lever is in D or S)B3F2B1F1B2F3B4C3C2C1F4C4: Operates: Operates but is not related to power f: Operates F: Operates but is not related to power transmission6) 6th Gear (Shift Lever is in D or S)B3F2F1B1B2F3B4C3C2C1F4C4: Operates: Operates but is not related to power transmissionC1C2FfC3C4B1B2B3FfF12DCH016YB4f: Operates F: Operates but is not related to power transmissionF1F2F3F4

123TOYOTA TUNDRA – NEW FEATURES7) Reverse Gear (Shift Lever is in R)B3F2F1B2B1B4F3C3C2C1F4C4: Operates: Operates during engine brakingC1C2C3fC4B112DCH017YB2 f: Operates : Operates during engine brakingB3B4F1ffF2F3F4

124TOYOTA TUNDRA – NEW FEATURESCentrifugal Fluid Pressure Canceling MechanismFor the following reason, the centrifugal fluid pressure canceling mechanism is used on the C1, C2, C3, andC4 clutches.D Clutch shifting operation is affected not only by the valve body controlling fluid pressure but also bycentrifugal fluid pressure that is present due to fluid in the clutch piston oil pressure chamber. Thecentrifugal fluid pressure canceling mechanism has chamber B to reduce the effect applied to thechamber A. As a result, smooth shifting with excellent response has been achieved.No. 4 Clutch (C4)PistonNo. 1 Clutch(C1)Chamber A(for C1)Chamber BChamber A(for C4)12DCH018YChamber A(Piston Fluid Pressure)ClutchPiston: Target fluid pressure: Centrifugal fluid pressureapplied to chamber A: Centrifugal fluid pressureapplied to chamber BChamber B(Canceling Fluid Pressure)Fluid PressureApplied to PistonShaft Side12ECH003IFluid pressureapplied to piston–Centrifugal fluid pressureapplied to chamber B Target fluid pressure(original clutch pressure)

125TOYOTA TUNDRA – NEW FEATURES8. Valve Body UnitGeneralThe valve body consists of the upper (No. 1 and No. 2) and lower (No. 1 and No. 2) valve bodies and 9 shiftsolenoid valves.Shift Solenoid Valve S1Shift Solenoid Valve SRShift Solenoid Valve S4Shift Solenoid Valve S2Shift Solenoid Valve S3No. 2 Upper Valve BodyShift SolenoidValve SL1No. 1 UpperValve BodyShift SolenoidValve SLTShift SolenoidValve SLUNo. 1 Lower Valve BodyNo. 2 Lower Valve BodyShift Solenoid Valve SL2"259LSK76No. 1 Upper Valve Body AClutch Control ValveClutch Apply Relay ValveC1 AccumulatorReverse Sequence Valve2 – 3 Shift Valve(Also Works as 5 – 6 Shift Valve)B2 AccumulatorSecondaryRegulator Valve259LSK74Lock-up Relay ValveLock-up Control ValveC3 Check Valve3 – 4 Shift ValveB4 Outer Check Valve1 – 2 Shift Valve

126TOYOTA TUNDRA – NEW FEATURES"No. 2 Upper Valve Body AC3 Apply Relay Valve259LSK72"No. 1 Lower Valve Body A4 – 5 Shift ValveSLT DamperPrimary Regulator Valve"259LSK73No. 2 Lower Valve Body ASL1 Relay ValveBrake Control ValveSolenoid Modulator ValveB1 Apply Relay ValveAccumulator Control Valve259LSK75

127TOYOTA TUNDRA – NEW FEATURESShift Solenoid Valve1) Shift Solenoid Valves S1, S2, S3, S4 and SRD These shift solenoid valves are 3-way solenoid valves.D A filter is provided at the tip of the shift solenoid valve to further improve operational reliability.Control PressureControl PressureLinePressureLinePressureFilterDrainShift Solenoid Valve Off(S1, S2, S3 and SR)040SC10CShift Solenoid Valve On(S1, S2, S3 and SR)Control PressureControl CShift Solenoid Valve Off (S4)"Shift Solenoid Valve On (S4)Function of Shift Solenoid Valves S1, S2, S3, S4 and SR AShift Solenoid ValveTypeFunctionS13-wayD Switches the 1 – 2 shift valve.D Switches the SL1 relay valve.S23-wayD Switches the 2 – 3 shift valve.D Switches the 5 – 6 shift valve.S33-waySwitches the 3 – 4 shift valve.S43-wayD Switches the 4 – 5 shift valve.D Switches the SL1 relay valve.D Switches the reverse sequence valve.SR3-wayD Switches the clutch apply relay valve.D Switches the B1 apply relay valve.

128TOYOTA TUNDRA – NEW FEATURES2) Shift Solenoid Valves SL1, SL2, SLT and SLUThese shift solenoid valves are used by the ECM to control hydraulic pressures in a linear fashion basedon the current that the ECM causes to flow through their solenoid coils. They control line, clutch, andbrake engagement pressure based on the signals received from the ECM.Spool ValveSolenoid CoilSleeveShift Solenoid Valves SL1 and SL2HydraulicPressureCurrentOutput Characteristicsof SL1, SL2 and SLTShift Solenoid Valve SLTHydraulicPressureShift Solenoid Valve SLUCurrentOutput Characteristics of SLU259LSK16"Function of Shift Solenoid Valves SL1, SL2, SLT and SLU AShift Solenoid ValveFunctionSL1D Clutch pressure controlD Accumulator back pressure controlSL2Brake pressure controlSLTD Line pressure controlD Accumulator back pressure controlSLULock-up clutch pressure control

TOYOTA TUNDRA – NEW FEATURES1299. Electronic Control SystemGeneralThe electronic control system of the A760E and A760F automatic transmissions consists of the controlfunctions listed below:ControlFunctionShift Timing ControlThe ECM sends current to shift solenoid valves S1, S2, S3, S4 and/orSR based on signals from various sensors, in order to shift the gears.Clutch Pressure Control(See page 137)D Controls the pressure applied directly to B2 brake and C3 clutch byactuating the shift solenoid valves SL1 and SL2 in accordance withthe ECM signals.D The shift solenoid valves SLT and SL1 minutely control the clutchpressure in accordance with the engine output and drivingconditions.Line Pressure OptimalControl(See page 138)Actuates the shift solenoid valve SLT to control the line pressure inaccordance with information from the ECM and the operatingconditions of the transmission.Engine Torque ControlRetards the engine ignition timing temporarily to improve shift feelingwhile upshifting or downshifting occurs.Lock-up Timing Control(See page 139)The ECM sends current to the shift solenoid valve SLU based onsignals from various sensors and engages or disengages the lock-upclutch.Flex Lock-up ClutchControl(See page 140)Controls the shift solenoid valve SLU, provides an intermediate modefor when the lock-up clutch is between on and off, and increases theoperating range of the lock-up clutch to improve fuel economy.Powertrain CooperativeControl(See page 142)Controls both the shift control and engine output control in anintegrated way, achieving excellent shift characteristics anddriveability.Coast Downshift Control(See page 143)To prevent engine speed from decreasing and thus maintain the fuelcut, the ECM performs downshifting before the fuel cut ends.Tow/Haul Control*(See page 144)To ensure driveability when a trailer is towed, the ECM controls theengine output, transmission shift schedule and shift timing.Artificial Intelligence-shift(AI-shift) Control(See page 147)Based on the signals from various sensors, the ECM determines theroad conditions and the intention of the driver. Thus, an appropriateshift pattern is automatically determined, thus improving driveability.Multi-mode AutomaticTransmission(See page 150)The ECM appropriately controls the automatic transmission inaccordance with the range position selected while the shift lever is in S.Diagnosis(See page 153)When the ECM detects a malfunction, the ECM records themalfunction and memorizes the information that relates to the fault.Fail-safe(See page 153)If a malfunction is detected in the sensors or solenoids, the ECMeffects fail-safe control to prevent the vehicle’s driveability from beingaffected significantly.*: Models with towing package

130TOYOTA TUNDRA – NEW FEATURESConstructionThe configurations of the electronic control system for the A760E and A760F automatic transmissions areas shown in the following chart:SHIFT SOLENOID VALVE S1MASS AIR FLOW METERSHIFT SOLENOID VALVE S2CRANKSHAFT POSITIONSENSORSHIFT SOLENOID VALVE S3SHIFT SOLENOID VALVE S4THROTTLE POSITIONSENSORSHIFT SOLENOID VALVE SRSHIFT SOLENOID VALVE SL1ACCELERATOR PEDALPOSITION SENSORSHIFT SOLENOID VALVE SL2SHIFT SOLENOID VALVE SLTENGINE COOLANTTEMPERATURE SENSORECMSHIFT SOLENOID VALVE SLUESAATF TEMPERATURESENSOR NO. 1ATF TEMPERATURESENSOR NO. 2IGNITION COILwith IGNITERNO. 1, 4, 6, 7SPARK PLUGSNO. 1, 4, 6, 7PARK/NEUTRAL POSITIONSWITCHESAIGNITION COILwith IGNITERNO. 2, 3, 5, 8TRANSMISSION CONTROLSWITCHSPARK PLUGSNO. 2, 3, 5, 812DCH019I(Continued)

131TOYOTA TUNDRA – NEW FEATURESCOMBINATION METERVehicle Speed SignalINPUT SPEED SENSORMILOUTPUT SPEED SENSORSTOP LIGHT SWITCH4WD CONTROL ECU*1TRANSFER NEUTRALPOSITION SWITCH*1TOW/HAUL PATTERNSELECT SWITCH*2ATF TEMPERATUREWARNING LIGHTSHIFT POSITIONINDICATOR LIGHTECMSHIFT RANGEINDICATORS MODE INDICATORLIGHTATF TEMPERATUREGAUGE*2TOW/HAUL INDICATORLIGHT*2CAN (V Bus)DLC312DCH020I*1: 4WD models*2: Models with towing package

132TOYOTA TUNDRA – NEW FEATURESLayout of Main ComponentsECMShift Solenoid Valve S1Shift Solenoid Valve S4Shift Solenoid Valve S2Shift Solenoid Valve SRShift Solenoid Valve S3Shift Solenoid Valve SL1Shift Solenoid Valve SLTShift SolenoidValve SLUShift Solenoid Valve SL2ATF TemperatureSensor No. 1Input Speed SensorATF Temperature Sensor No. 2Park/Neutral Position SwitchOutput Speed Sensor12DCH021Y

133TOYOTA TUNDRA – NEW FEATURESMILShift Position Indicator LightATF TemperatureWarning LightS Mode IndicatorLightATF TemperatureGauge*Shift Range IndicatorTOW/HAUL Indicator Light*Shift Lever Assembly (Column Shift)D Transmission Control SwitchD TOW/HAUL Pattern Select Switch*TOW/ HAUL PatternSelect Switch*DLC3Stop Light SwitchAccelerator PedalPosition SwitchShift Lever Assembly (Floor Shift)D Transmission Control SwitchD Shift Lock ECU12DCH022Y*: Models with towing package

134TOYOTA TUNDRA – NEW FEATURESConstruction and Operation of Main Components1) ATF Temperature Sensors No. 1 and No. 2D The ATF temperature sensor No. 1 (THO1) is used for hydraulic pressure control. This sensor is usedfor revision of the pressure that is used to apply clutches and brakes in the transmission. This helpsto ensure smooth shift quality.D The ATF temperature sensor No. 2 (THO2) is used as a basi

TOYOTA TUNDRA – NEW FEATURES 109 Specifications Transmission Type A760E Engine Type 1UR-FE Gear Ratio 1st 3.520 2nd 2.042 3rd 1.400 4th 1.000 5th 0.716 6th 0.586 Reverse 3.224