2008 Lexus IS FFACTORY OEM SERVICE PROCEDURE

Automatic Transmission Assembly: Installation

  1. INSTALL TRANSMISSION BREATHER ASSEMBLY 
    1. Install the 2 bolts to the transmission breather assembly in the order shown in the illustration

      Torque: Bolt 1 

      7.0 N*m (71 kgf*cm, 62 in.*lbf) 

      Bolt 2 

      7.0 N*m (71 kgf*cm, 62 in.*lbf) 

      BOLT LENGTH SPECIFICATION

      Bolt Bolt Length
      1 30 mm (1 18 in)
      2 14 mm (0 551 in)

      HINT

      Be sure to install the transmission breather assembly so that the pipe is positioned between the two-way wire harness.

      Fig 1: Locating Transmission Breather Assembly And Clamps With Bolts
      G05750987Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Connect the 2 wire harness clamps to the transmission breather assembly
    3. Install the bolt and ground wire to the transmission breather assembly

      Torque: 10 N*m (102 kgf*cm, 7 ft.*lbf) 

  2. INSTALL AUTOMATIC TRANSMISSION BREATHER TUBE 
    1. Connect the breather hose to the breather tube

      HINT.

      Be sure to insert the breather hose to the end

    2. Install a new O-ring
    3. Coat the O-ring with ATF.
    4. Install the transmission breather tube with the bolt

      Torque: 5.4 N*m (55 kgf*cm, 48 in.*lbf) 

  3. INSPECT TORQUE CONVERTER CLUTCH ASSEMBLY 
    1. Inspect the torque converter clutch (see TORQUE CONVERTER CLUTCH AND DRIVE PLATE  )
      Fig 2: Locating Automatic Transmission Breather Tube
      G05750985Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. INSTALL TORQUE CONVERTER CLUTCH ASSEMBLY 
    1. Using a vernier caliper and a straightedge, measure dimension A between the transmission and the end surface of the drive plate
      Fig 3: Measuring Dimension A Between Transmission And End Surface Of Drive Plate
      G05750989Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Aligning the matchmarks on the transmission case and torque converter clutch, engage the splines of the input shaft and turbine runner.
      Fig 4: Identifying Matchmarks On Transmission Case
      G04948574Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Engage the splines of the stator shaft and stator while turning the torque converter clutch.

      HINT.

      Turn the torque converter clutch approximately 180°.

      Fig 5: Turning Torque Converter Clutch
      G04948575Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. 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
      NOTE: Do not push on the torque converter when aligning the matchmarks.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • 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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