2006 Lexus IS 350FACTORY OEM SERVICE PROCEDURE

Automatic Transmission Unit: Reassembly

  1. BEARING POSITION 
    Fig 1: Identifying Bearing Position
    G04053252Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    BEARING POSITION

    Mark Front Race Diameter Inside/Outside Thrust Bearing Diameter Inside/Outside Rear Race Diameter Inside/Outside
    A 74.2 mm (2.921 in.) /87.74 mm (3.454 in.) 71.9 mm (2.831 in.) /85.6 mm (3.370 in.) -
    B 38.0 mm (1.496 in.) /57.0 mm (2.244 in.) 43.4 mm (1.709 in.) /58.3 mm (2.295 in.) -
    C - 55.7 mm (2.193 in.) /76.4 mm (3.008 in.) -
    D - - 53.7 mm (2.114 in.) /74.0 mm (2.913 in.)
    E 33.4 mm (1.315 in.) /49.0 mm (1.929 in.) 32.1 mm (1.264 in.) 49.35 mm (1.943 in.) 32.1 mm (1.264 in.) /49.0 mm (1.929 in.)
    F - 21.5 mm (0.847 in.) /40.8 mm (1.606 in.) -
    G - 43.6 mm (1.717 in.) /61.0 mm (2.402 in.) 47.1 mm (1.854 in.) /67.1 mm (2.642 in.)
    H 37 mm (1.45 in.) /52.3 mm (2.059 in.) 34.6 mm (1.362 in.) /52.0 mm (2.047 in.) -
    I 36.9 mm (1.453 in.) /49.7 mm (1.957 in.) 36.1 mm (1.421 in.) /52.5 mm (2.067 in.) 36.1 mm (1.421 in.) /51.0 mm (2.007 in.)
  2. INSTALL NO. 4 BRAKE PISTON 
    1. Coat 2 new O-rings with ATF, and install them to the brake reaction sleeve.
    2. Coat 2 new O-rings with ATF, and install them to the No. 4 brake piston.
    3. Install the No. 4 brake piston to the reaction sleeve.
      Fig 2: Installing O-Ring To Brake Reaction Sleeve
      G04053253Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

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.