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Home >> Subaru >> 2023 >> BRZ Limited, Automatic Trans >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission System >> Rear Planetary Gear >> Removal

Rear Planetary Gear: Removal

  1. Remove the intermediate shaft. Ref. to AUTOMATIC TRANSMISSION>INTERMEDIATE SHAFT>REMOVAL .
  2. Remove the brake plate stopper spring.
    G16526026Courtesy of SUBARU OF AMERICA, INC.
  3. Remove the No. 4 front brake flange, No. 4 brake discs, No. 4 brake plates, and No. 4 rear brake flange.
    G16526027Courtesy of SUBARU OF AMERICA, INC.
    (A) No. 4 front brake flange
    (B) No. 4 brake disc
    (C) No. 4 brake plate
    (D) No. 4 rear brake flange
    (E) Transmission case
  4. Check the No. 4 front brake flange, No. 4 brake discs, No. 4 brake plates, and No. 4 rear brake flange.
    1. Check for wear, damage, deformation, discoloration and seizure.
    2. Replace with a new part if defective.
      G16525859Courtesy of SUBARU OF AMERICA, INC.
    3. Place the surface plate on a weight scale, and stack the No. 4 front brake flange, No. 4 brake discs, No. 4 brake plates, and No. 4 rear brake flange.
    4. Adjust the reading of the weight scale to the zero point.
    5. Place a weight so that the reading value of the weight scale becomes 0.5 kg (1.10 lb) or less, and then measure and record the thickness "T1".
      NOTE:
      • Prepare a weight with the length of one side equal to or longer than the No. 4 front brake flange outer diameter, and also flat shape that allows load to be applied evenly.
      • Measure at four points at 90° intervals and calculate the average.

      Service limit: 

      23.64 mm (0.931 in)

      G16526029Courtesy of SUBARU OF AMERICA, INC.
      (A) No. 4 front brake flange
      (B) No. 4 brake disc
      (C) No. 4 brake plate
      (D) No. 4 rear brake flange
    6. If the value exceeds the service limit, measure the No. 4 front brake flange.
      1. If the thickness of the No. 4 front brake flange is 1.929 mm (0.0759 in), replace with new No. 4 brake discs and new No. 4 brake plates, and perform measurement in step  3 again.
      2. If the thickness of the No. 4 front brake flange is other than 1.929 mm (0.0759 in), record it.

        Specification: 

        23.64 - 26.00 mm (0.931 - 1.024 in)

  5. Remove the rear planetary gear.
    G16526030Courtesy of SUBARU OF AMERICA, INC.
    (A) Rear planetary gear
    (B) Transmission case
  6. Remove the thrust needle roller bearing.
G16526031Courtesy of SUBARU OF AMERICA, INC.
(A) Thrust needle roller bearing
(B) Transmission case
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