2008 Lexus IS FFACTORY OEM SERVICE PROCEDURE

Automatic Transmission Unit: Disassembly

  1. REMOVE HARNESS BRACKET 
    1. Remove the 2 bolts and harness brackets.
      Fig 1: Locating Harness Brackets Bolts
      G05751014Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. REMOVE TRANSMISSION CONTROL SHAFT LEVER RH 
    1. Remove the nut, spring washer and transmission control shaft lever RH.
      Fig 2: Locating Transmission Control Shaft Lever Nut
      G05751015Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. REMOVE PARK/NEUTRAL POSITION SWITCH ASSEMBLY 
    1. Using a screwdriver, bend the tabs of the lock washer.
    2. Remove the nut and lock washer.
    3. Remove the bolt and park/neutral position switch assembly.
      Fig 3: Identifying Nut And Lock Washer
      G05751016Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. REMOVE OIL COOLER TUBE UNION 
    1. Remove the 2 oil cooler tube unions.
    2. Remove the 2 O-rings from the 2 oil cooler tube unions.
      Fig 4: Removing Oil Cooler Tube Unions
      G05751017Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. REMOVE AUTOMATIC TRANSMISSION BREATHER TUBE 
    1. Remove the bolt and automatic transmission breather tube
    2. Remove the O-ring from the automatic transmission breather tube
      Fig 5: Locating Automatic Transmission Breather Tube With Bolt
      G05751018Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. REMOVE AUTOMATIC TRANSMISSION FLANGE YOKE ASSEMBLY 
    1. Using SST and a hammer, loosen the staked part of the nut

      SST 09930-00010 

      Fig 6: Tapping Automatic Transmission Flange Yoke Nut
      G04948618Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Using SST and a 30 mm socket wrench, remove the nut

      SST 09330-00021, 09950-30012 (09955-03040) 

    3. Remove SST.
    4. Tap the flange yoke with a plastic-faced hammer to remove it.
    5. Remove the 2 rear No 1 output shaft bearing spacers and rear cover sleeve
      Fig 7: Holding Flange Yoke Removing Nut
      G05751020Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Using a screwdriver, pry out the oil seal from the flange yoke
  7. REMOVE AUTOMATIC TRANSMISSION OIL PAN SUB-ASSEMBLY 
    NOTE: Do not turn the transmission over as this will contaminate the valve body with foreign matter located at the bottom of the pan.
    1. Remove the overflow plug and gasket
    2. Remove the drain plug and gasket
      Fig 8: Identifying Oil Seal From Flange Yoke
      G04948620Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Remove the 9 bolts, oil pan and gasket
      Fig 9: Locating Oil Pan Bolts
      G04948406Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Examine the particles in the pan
      1. Remove the magnets from the oil pan Use the removed magnets to collect any steel chips Look carefully at the chips and particles in the pan and on the magnet to anticipate the type of wear which might be found in the transmission. Steel (magnetic), bearing, gear and plate wear Brass (non-magnetic). bush wear
        Fig 10: Examining Particles In Pan
        G04831117Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  8. REMOVE VALVE BODY OIL STRAINER ASSEMBLY 
    1. Remove the 4 bolts and valve body oil strainer from the valve body.
      Fig 11: Locating Oil Strainer Bolts
      G04948408Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the O-ring from the valve body oil strainer.
      Fig 12: Identifying O-Ring
      G04948409Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  9. REMOVE TRANSMISSION VALVE BODY ASSEMBLY 
    1. Remove the bolt, lock plate and ATF temperature sensor.
    2. Remove the O-ring from the ATF temperature sensor.
    3. Disconnect the oil pressure switch connector.
    4. Disconnect the 9 connectors from the solenoid valves.
      Fig 13: Locating Solenoid Valves Connector
      G04948410Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Remove the bolt, detent spring cover and detent spring
      Fig 14: Locating Detent Spring Cover And Detent Spring
      G04948411Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Remove the 17 bolts.
    7. Remove the valve body
      Fig 15: Locating Bolts
      G04948412Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    8. Disconnect the manual valve connecting rod from the manual valve lever sub-assembly.
      Fig 16: Disconnecting Manual Valve Connecting Rod From Manual Valve Lever Sub-Assembly
      G05751029Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  10. REMOVE CHECK BALL BODY 
    1. Remove the check ball body and spring
      Fig 17: Identifying Check Ball Body And Spring
      G04948413Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  11. REMOVE TRANSMISSION WIRE 
    1. Disconnect the 3 connectors from the 3 speed sensors
      Fig 18: Locating Speed Sensor Connectors
      G04948439Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the bolt and pull out the transmission wire
    3. Remove the O-ring from the transmission wire connector
      Fig 19: Locating Transmission Wire Bolt
      G04948441Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  12. REMOVE SPEED SENSOR 
    1. Remove the 2 bolts and 2 speed sensors NC3 and SP2
    2. Using a T30 "TORX" wrench, remove the bolt and speed sensor NT.
    3. Remove the O-ring from the speed sensor NT.
      Fig 20: Locating Speed Sensors NC3 And SP2
      G04948631Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  13. REMOVE AUTOMATIC TRANSMISSION CASE PLUG 
    1. Remove the plug and O-ring
      Fig 21: Locating Automatic Transmission Case Plug
      G04948632Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  14. REMOVE PARKING LOCK PAWL BRACKET 
    1. Remove the 3 bolts and parking lock pawl bracket.
      Fig 22: Locating Parking Lock Pawl Bracket Bolts
      G04948633Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  15. REMOVE PARKING LOCK ROD SUB-ASSEMBLY 
    1. Disconnect the parking lock rod from the manual valve lever.
      Fig 23: Disconnecting Parking Lock Rod From Manual Valve Lever
      G04948634Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  16. REMOVE PARKING LOCK PAWL SHAFT 
    1. Pull out the parking lock pawl shaft from the front side, then remove the lock pawl and spring.
    2. Remove the E-ring from the shaft
      Fig 24: Removing E-Ring From Shaft
      G04948635Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  17. REMOVE MANUAL VALVE LEVER SUB-ASSEMBLY 
    1. Using a screwdriver and hammer, cut off the spacer and remove it from the shaft.
      Fig 25: Cutting Spacer
      G04948636Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Using a pin punch and hammer, tap out the spring pin

      HINT.

      Slowly tap out the spring pin so that it will not fall into the transmission case.

    3. Pull the manual valve lever shaft out through the case, and remove the manual valve lever sub-assembly
      Fig 26: Tapping Spring Pin
      G04948637Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  18. REMOVE MANUAL VALVE LEVER SHAFT OIL SEAL 
    1. Using a screwdriver, pry out the oil seal.
      Fig 27: Prying Out Oil Seal
      G04948638Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  19. REMOVE OIL PUMP ASSEMBLY 
    1. Remove the 11 bolts from the transmission case.
      Fig 28: Locating Transmission Case Bolts
      G04948639Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Pull out the oil pump.
      NOTE: Do not damage the oil pump.
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