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Home >> Subaru >> 2023 >> BRZ Limited, Automatic Trans >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission System >> No. 2 Brake Cylinder >> Installation

No. 2 Brake Cylinder: Installation

  1. Install the planetary sun gear and the center planetary gear to the transmission case.
  2. Use vaseline to attach the No. 4 thrust bearing race.
    NOTE: Make sure to install the No. 4 thrust bearing race in the right direction.
  3. Install the thrust needle roller bearing.
    NOTE: Make sure to install the thrust needle roller bearing in the right direction.
    G16526007Courtesy of SUBARU OF AMERICA, INC.
    (A) Oil pump side
    (B) Thrust needle roller bearing
    (C) No. 4 thrust bearing race
    (D) Center planetary gear
    (E) Planetary sun gear
    (F) Transmission case
  4. Install the No. 2 brake cylinder.
    NOTE: Make sure to install the No. 2 brake cylinder in the right direction.
  5. Check that the oil pressure apply hole of the No. 2 brake cylinder matches the oil pressure apply hole (A) of the transmission case.
    G16526008Courtesy of SUBARU OF AMERICA, INC.
  6. Install the No. 2 front brake flange, No. 2 brake discs, No. 2 brake plates, No. 2 rear brake flange, and No. 2 brake piston return spring.
    NOTE: When replacing with new No. 2 brake discs, soak them in the ATF for 15 minutes.
    G16526001Courtesy of SUBARU OF AMERICA, INC.
    (A) No. 2 front brake flange
    (B) No. 2 brake disc
    (C) No. 2 brake plate
    (D) No. 2 rear brake flange
    (E) No. 2 brake piston return spring
    (F) Transmission case
  7. Using the ST1, ST2, and ST3, compress the No. 2 brake piston return spring.
    CAUTION: Be careful not to damage the transmission case with the ST1 and ST2.

    Preparation tool: 

    ST1: compressor special tool (18762AA020)

    ST2: OIL PUMP PULLER (09350-07020)

    ST3: PIPE (09351-04010)

  8. Using a flat tip screwdriver wrapped with protection tape, install the snap ring.
    G16526010Courtesy of SUBARU OF AMERICA, INC.
  9. Check the operation of the No. 2 brake piston.
    1. Blow compressed air through the hole shown in the figure, and check that the No. 2 brake piston moves smoothly when the pressure is released.
      NOTE: Blow compressed air of 392 kPa (4.0 kgf/cm2 , 56.8 psi).
      G16526011Courtesy of SUBARU OF AMERICA, INC.
    2. Perform the following check if the piston does not move smoothly.
      1. Check that the oil pressure apply hole of the No. 2 brake cylinder matches the oil pressure apply hole of the transmission case.
      2. Check the installation of the No. 2 front brake flange, No. 2 brake discs, No. 2 brake plates, No. 2 rear brake flange, and No. 2 brake piston return spring.
      3. Check the installation of the No. 2 brake cylinder and the No. 2 brake piston.
  10. Check the piston stroke of No. 2 brake piston.
    1. Set the ST, dial gauge (spindle type), and magnet stand.

      Preparation tool: 

      ST: TERMINAL NO. 2 MAJOR (09350-06120)

    2. Measure the piston stroke of the No. 2 brake piston when blowing compressed air through the hole shown in the figure.
      NOTE:
      • Blow compressed air of 392 kPa (4.0 kgf/cm2 , 56.8 psi).
      • Measure at four points at 90° intervals and calculate the average.

      Specification: 

      0.6 - 0.9 mm (0.02 - 0.04 in)

      G16525999Courtesy of SUBARU OF AMERICA, INC.
    3. When the value exceeds the specification, adjust the thickness of the No. 2 rear brake flange (A) based on the thickness of the No. 2 rear brake flange recorded in the removal step 5. (2) so that the value is within the initial standard, and measure the piston stroke of the No. 2 brake piston again.

      Initial standard: 

      0.6 - 0.9 mm (0.02 - 0.04 in)

    G16526013Courtesy of SUBARU OF AMERICA, INC.
  11. Install the No. 1 brake cylinder. Ref. to AUTOMATIC TRANSMISSION>NO. 1 BRAKE CYLINDER>INSTALLATION .
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