Lexus IS250 · Service Manual TRANSMISSION

INSTALLATION

Removal / installation


1. INSTALL TORQUE CONVERTER CLUTCH ASSEMBLY

  1. C108499E02
    Using calipers and a straight edge, measure dimension A between the engine and the end surface of the drive plate (#1).

  1. C108500E05
    Aligning the matchmarks on the transmission case and torque converter, engage the splines of the input shaft and turbine runner.

  1. Z036066E06
    Engage the splines of the stator shaft and stator while turning the torque converter clutch.

    HINT:
    Turn the torque converter clutch approximately 180°.

  1. Z036072E03
    Turn the torque converter clutch and align the matchmarks on the torque converter clutch and transmission case to engage the key of the oil pump drive gear into the slot on the torque converter clutch.

    NOTICE:
    Do not push on the torque converter when aligning the matchmarks.

  1. Z036073E03
    Using calipers and a straight edge, measure dimension B shown in the illustration and check that B is greater than A measured in step (#1).

    Standard:
    A + 1 mm (0.04 in.) or more


2. INSTALL TRANSMISSION OIL COOLER
  1. Coat 2 new O-rings with ATF and install them to the transmission oil cooler.

  1. C110966E02
    Install the transmission oil cooler to the automatic transmission assembly with the 3 bolts.

    Torque:
    21 N*m{ 214 kgf*cm , 15 ft.*lbf }


3. INSTALL TRANSMISSION CONTROL SHAFT LEVER RH

  1. C108490E03
    Install the transmission control shaft to the neutral start switch assembly with the nut.

    Torque:
    16 N*m{ 163 kgf*cm , 12 ft.*lbf }


4. INSTALL REAR NO. 1 ENGINE MOUNTING INSULATOR

  1. C104319
    Install the rear No. 1 engine mounting insulator to the automatic transmission assembly with the 4 bolts.

    Torque:
    12 N*m{ 120 kgf*cm , 9 ft.*lbf }


5. INSTALL AUTOMATIC TRANSMISSION ASSEMBLY

  1. C110860E01
    Install the automatic transmission assembly to the engine with the 9 bolts.

    Torque:
    Bolts A and B:
    71 N*m{ 724 kgf*cm , 52 ft.*lbf }
    Bolt C:
    37 N*m{ 377 kgf*cm , 27 ft.*lbf }

    HINT:
    1. Make sure that the mark is as shown in the illustration.
    2. Do not use excess force to pry on the transmission assembly.


6. INSTALL WATER BY-PASS HOSE

  1. C124478E01
    Tilt down the automatic transmission assembly.

  1. C108496E02
    Install the 2 water by-pass hoses to the transmission assembly.

  1. Install the water by-pass hose clamp with the bolt.

    Torque:
    20 N*m{ 204 kgf*cm , 15 ft.*lbf }


7. INSTALL WIRE HARNESS

  1. C125827E01
    Install the wire harness clamps to the automatic transmission assembly with the 2 bolts.

    Torque:
    10 N*m{ 102 kgf*cm , 7 ft.*lbf }


8. INSTALL CONNECTOR

  1. C125826E02
    Connect the park/neutral position switch connector, transmission wire connector, and 2 transmission revolution sensor connectors.

    HINT:
    Push up the lever until the claw of the transmission wire connector makes a connection sound.


9. INSTALL ENGINE REAR MOUNTING MEMBER

  1. C124478E02
    Tilt up the automatic transmission assembly.

  1. C104753
    Install the engine rear mounting member to the automatic transmission assembly with the 4 nuts.

    Torque:
    13 N*m{ 133 kgf*cm , 10 ft.*lbf }

  1. C104745
    Install the engine rear mounting member to the body with the 4 bolts.

    Torque:
    26 N*m{ 260 kgf*cm , 19 ft.*lbf }


10. INSTALL FLOOR SHIFT GEAR SHIFTING ROD SUB-ASSEMBLY

  1. C104743
    Temporarily tighten the floor shift gear shifting rod sub-assembly with the nut.


11. INSTALL NO. 1 EXHAUST PIPE SUPPORT BRACKET SUB-ASSEMBLY

  1. C108503E02
    Install the No. 1 exhaust pipe support bracket sub-assembly to the automatic transmission assembly with the 2 bolts.

    Torque:
    43 N*m{ 438 kgf*cm , 32 ft.*lbf }


12. INSTALL DRIVE PLATE & TORQUE CONVERTER CLUTCH SETTING BOLT

  1. C108495E02
    Install the 6 torque converter clutch setting bolts.

    Torque:
    41 N*m{ 418 kgf*cm , 30 ft.*lbf }

    HINT:
    First install the black colored bolt and then the remaining 5 bolts.


13. INSTALL STARTER ASSEMBLY

  1. A094953E08
    Install the starter with the 2 bolts.

    Torque:
    58 N*m{ 591 kgf*cm , 43 ft.*lbf }

  1. Connect the wire harness to terminal 30 and install the nut, and then attach the terminal cap.

    Torque:
    9.8 N*m{ 100 kgf*cm , 87 in.*lbf }

  1. Connect the terminal 50 connector to the starter assembly.


14. INSTALL EXHAUST MANIFOLD SUB-ASSEMBLY LH

  1. A096590E02
    Install a new gasket and the exhaust manifold with 6 new nuts.

    Torque:
    21 N*m{ 214 kgf*cm , 15 ft.*lbf }

  1. A121867
    Connect the air fuel ratio sensor (for sensor 1) connector.

  1. A122255E01
    Install the engine wire bracket with the bolt (A).

    Torque:
    10 N*m{ 102 kgf*cm , 7 ft.*lbf }

  1. Install the ground cable with the 2 bolts (B, C).

    Torque:
    Bolt (B):
    10 N*m{ 102 kgf*cm , 7 ft.*lbf }
    Bolt (C):
    13 N*m{ 133 kgf*cm , 10 ft.*lbf }


15. INSTALL PROPELLER SHAFT WITH CENTER BEARING ASSEMBLY

  1. C109590E02
    Remove the SST from the transmission.
    SST
    09325-40010  

  1. Insert the yoke of the intermediate shaft into the transmission.

    HINT:
    Be careful not to damage the oil seal.

  1. F048233
    Install the 2 center support bearing washers and center support bearing. (for automatic transmission)

  1. Install the 2 center support bearing washers, center support bearing and 2 center support bearing dampers. (for manual transmission)

  1. Temporarily tighten the 2 bolts.

  1. C104521E02
    Align the matchmarks on the propeller shaft flange and differential companion flange, and connect the shaft with the 4 bolts, washers and nuts.

    Torque:
    74 N*m{ 750 kgf*cm , 54 ft.*lbf }

  1. C127022E01
    Adjust the dimension between the edge surface of the center support bearing and the edge surface of the cushion to 11.5 to 13.5 mm (0.4528 to 0.5315 in.) as shown in illustration.

  1. C109375E01
    Check that the center line of the bracket is perpendicular to the shaft axial direction.

  1. F048233
    Tighten the 2 bolts.

    Torque:
    49 N*m{ 500 kgf*cm , 36 ft.*lbf }


16. INSTALL OUTSIDE AIR GUIDE PLATE RH

  1. C126031
    Install the air guide plate outside RH with the 4 nuts.

    Torque:
    5.4 N*m{ 55 kgf*cm , 48 in.*lbf }


17. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL

18. ADJUST SHIFT LEVER POSITION

  1. C110474
    Remove the nut and disconnect the shifting rod.

  1. C064305E04
    Turn the control shaft lever of the park/neutral position switch counterclockwise until it stops, and turn it clockwise 2 notches to set it to the N position.

  1. Move the shift lever to the N position and tighten the nut while lightly pushing the lever toward the R position.

    NOTICE:
    Do not push the shift lever too hard.

  1. After adjustment, check that the shift lever moves smoothly and the shift lever and gear operate correctly.


19. INSPECT SHIFT LEVER POSITION
  1. When shifting from the P to R position with the engine switch on (IG) and the brake pedal depressed, make sure that the shift lever moves smoothly and moves correctly into the position.

  1. Start the engine and make sure that the vehicle moves forward when shifting from the N to D position and moves rearward when shifting to the R position.
    If operation cannot be done as specified, inspect the park/neutral position switch assembly and check the shift lever assembly installation condition.


20. INSTALL FRONT FLOOR NO. 1 HEAT INSULATOR

  1. C125771E01
    Install the No. 1 heat insulator with the 4 nuts.

    Torque:
    5.4 N*m{ 55 kgf*cm , 48 in.*lbf }


21. INSTALL FRONT EXHAUST PIPE ASSEMBLY

  1. A077857
    Using a vernier caliper, measure the free length of the compression springs.

    Minimum length:
    38.5 mm (1.516 in.)

    If the free length is less than the minimum, replace the compression spring.

  1. A109513E09
    Install a new gasket to the rear end of the front exhaust pipe.

    NOTICE:
    1. Be careful with the installation direction of the gasket.
    1. Do not reuse the gasket.
    1. To ensure a proper seal, do not use the tail exhaust pipe to force the gasket onto the front exhaust pipe.

      HINT:
      Using a plastic hammer, uniformly strike the gasket so that the gasket and front exhaust pipe are properly fit.

  1. Install 3 new gaskets and front exhaust pipe assembly.

    CAUTION:
    Do not reuse the gaskets.

  1. A125008
    Install the 2 bolts and 2 compression springs.

    Torque:
    43 N*m{ 438 kgf*cm , 32 ft.*lbf }

  1. A127822E01
    Install 4 new nuts and 4 bolts.

    Torque:
    62 N*m{ 632 kgf*cm , 46 ft.*lbf }

    NOTICE:
    Do not reuse the nuts.


22. INSTALL OXYGEN SENSOR

  1. A119092
    Before installing the heated oxygen sensors, twist the sensor wires counterclockwise 4 turns.

  1. A123663E02
    Using the SST, install the heated oxygen sensors to the front exhaust pipe.
    SST
    09224-00010  

    Torque:
    44 N*m{ 449 kgf*cm , 33 ft.*lbf }

  1. After installing the sensors, check that the sensor wires are not twisted.
    If the sensor wires are twisted, reinstall them.

  1. A120539E05
    Install the grommets of the heated oxygen sensors.


23. INSTALL FRONT CENTER FLOOR BRACE

  1. C104834
    Install the front center floor brace with the 4 bolts.

    Torque:
    7.4 N*m{ 75 kgf*cm , 65 in.*lbf }


24. INSTALL REAR NO. 1 FLOOR PANEL BRACE

  1. A121036
    Install the rear No. 1 floor panel brace with the 4 bolts.

    Torque:
    19 N*m{ 194 kgf*cm , 14 ft.*lbf }


25. ADD COOLANT
(Click here)

26. ADD AUTOMATIC TRANSMISSION FLUID
(Click here)

27. ADJUST COOLANT
(Click here)

28. CHECK FOR ENGINE COOLANT LEAKS

A094882E02

NOTICE:
Before performing each inspection, turn the A/C switch OFF.

CAUTION:
Do not remove the radiator cap while the engine and radiator are still hot. Pressurized, hot engine coolant and steam may be released and cause serious burns.

  1. Fill the radiator with coolant and attach a radiator cap tester.

  1. Warm up the engine.

  1. Using a radiator cap tester, increase the pressure inside the radiator to 118 kPa (1.2 kgf*cm2, 17 psi), and check that the pressure does not drop.
    If the pressure drops, check the hoses, radiator and water pump for leaks. If no external leaks are found, check the heater core, cylinder block and cylinder head.


29. CHECK FOR EXHAUST GAS LEAKS
If exhaust gas is leaking, tighten the related parts to stop the leak. Replace damaged parts as necessary.

30. REMOVE ENGINE UNDER COVER AIR GUIDE BRACKET

  1. C107691
    Install the engine under cover air guide bracket with the 2 bolts.

    Torque:
    26 N*m{ 265 kgf*cm , 19 ft.*lbf }


31. INSTALL NO. 2 ENGINE UNDER COVER

32. INSTALL ENGINE UNDER COVER

33. INSTALL ENGINE ROOM SIDE COVER LH

  1. A123702E01
    Install the side cover with the 5 clips.


34. INSTALL COOL AIR INTAKE DUCT SEAL

  1. A127530
    Install the intake duct seal with the 11 clips.


35. RESET MEMORY
(Click here)

36. PERFORM INITIALIZATION
Some systems need initialization after reconnecting the cable to the negative battery terminal
(Click here).
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