2008 Lexus SC 430FACTORY OEM SERVICE PROCEDURE

Automatic Transmission Unit: Reassembly

  1. BEARING POSITION 
    Fig 1: Identifying Bearing Position
    G05289945Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Bearing Position 

    BEARING POSITION SPECIFICATION

    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 brake piston.
    3. Install the brake piston to the reaction sleeve.
      NOTE: Do not damage the O-rings.
Factory Service Tools

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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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