2007 Lexus SC 430FACTORY OEM SERVICE PROCEDURE

Automatic Transmission Unit: Disassembly

  1. REMOVE TRANSMISSION CASE COVER UPPER 
    1. Remove the 2 bolts and transmission case cover.
  2. REMOVE TRANSMISSION CONTROL SHAFT LEVER RH 
    1. Remove the nut and transmission control shaft lever.
      Fig 1: Locating Transmission Control Shaft Lever Nut
      G05289842Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. REMOVE PARK/NEUTRAL POSITION SWITCH ASSEMBLY 
    1. Using a screwdriver, unstake the lock washer.
    2. Remove the nut and lock washer.
    3. Remove the bolt and park/neutral position switch.
      Fig 2: Removing Park/Neutral Position Switch Assembly
      G05289843Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. REMOVE OIL COOLER TUBE UNION 
    1. Remove the 2 oil cooler tube unions.
    2. Remove the O-rings from the unions.
      Fig 3: Removing Oil Cooler Tube Union
      G05289844Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. REMOVE TRANSMISSION REVOLUTION SENSOR 
    1. Remove the 2 bolts and 2 sensors.
    2. Remove the O-ring from each sensor.
      Fig 4: Locating Transmission Revolution Sensors Bolt
      G05289845Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. REMOVE AUTOMATIC TRANSMISSION BREATHER TUBE 
    1. Remove the 2 bolts and breather tube.
      Fig 5: Locating Automatic Transmission Breather Tube Bolts
      G05289846Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. REMOVE AUTOMATIC TRANSMISSION HOUSING 
    1. Remove the 10 bolts.
    2. Remove the transmission housing.
      Fig 6: Locating Automatic Transmission Housing Bolts
      G05289847Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  8. REMOVE AUTOMATIC TRANSMISSION FLANGE YOKE ASSEMBLY 
    1. Using SST and a hammer, loosen the staked part of the nut.

      SST 09930-00010 

      Fig 7: Loosening Staked Part Of Nut
      G05289848Courtesy 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 output flange with a plastic-faced hammer to remove it.
      Fig 8: Removing SST
      G05289849Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Remove the oil seal from the flange yoke.
      Fig 9: Removing Oil Seal From Flange Yoke
      G05289850Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  9. REMOVE EXTENSION HOUSING SUB-ASSEMBLY 
    1. Remove the 6 bolts.
      Fig 10: Locating Extension Housing Sub-Assembly Bolts
      G05289851Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Using a screwdriver, pry out the extension housing.
      Fig 11: Prying Out Extension Housing
      G05289852Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Using a snap ring expander, remove the snap ring.
    4. Remove the thrust needle roller bearing and the 2 bearing races.
      Fig 12: Removing Snap Ring
      G05289853Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  10. REMOVE REAR COVER SLEEVE 
    1. Remove the 2 washers and cover sleeve.
  11. REMOVE TRANSMISSION CASE ADAPTOR RADIAL BALL BEARING 
    1. Remove the transmission case adaptor radial ball bearing from the extension housing.
      Fig 13: Removing Transmission Case Adaptor Radial Ball Bearing From Extension Housing
      G05289854Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  12. REMOVE AUTOMATIC TRANSMISSION EXTENSION HOUSING OIL SEAL 
    1. Using a screwdriver, pry out the oil seal.
      Fig 14: Prying Out Oil Seal
      G05289855Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  13. FIX AUTOMATIC TRANSMISSION CASE SUB-ASSEMBLY 
    1. Install the transmission case on the overhaul attachment.
  14. 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.
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  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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