Overdrive Brake Reassembly


  1. INSTALL OVERDRIVE CLUTCH DRUM OIL SEAL RING

  2. INSTALL OVERDRIVE BRAKE PISTON

  3. INSTALL OVERDRIVE BRAKE RETURN SPRING

  4. INSPECT PISTON OPERATION OF OVERDRIVE BRAKE

Overdrive Brake -- Reassembly



1. INSTALL OVERDRIVE CLUTCH DRUM OIL SEAL RING


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A340F Automatic Transmission.Overdrive Brake.Overdrive Brake  Reassembly
  1. Coat the 2 oil seal rings with ATF.

  1. Squeeze the ends of the 2 oil seal rings together, and then install them to the starter shaft groove.

    NOTICE:
    Do not expand the ring ends excessively.
    HINT:
    After installing the oil seal rings, check that they rotate smoothly.


    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A340F Automatic Transmission.Overdrive Brake.Overdrive Brake  Reassembly
  1. Coat the thrust washer with petroleum jelly, and install it into the overdrive support.

    HINT:
    Make sure that the tab of the washer fits into the groove on the overdrive support.


2. INSTALL OVERDRIVE BRAKE PISTON


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A340F Automatic Transmission.Overdrive Brake.Overdrive Brake  Reassembly
  1. Coat 2 new O-rings with ATF, and install them in the overdrive brake piston.



    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A340F Automatic Transmission.Overdrive Brake.Overdrive Brake  Reassembly
  1. Be careful not to damage the O-rings, and press in the brake piston into the overdrive support with both hands.



3. INSTALL OVERDRIVE BRAKE RETURN SPRING


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A340F Automatic Transmission.Overdrive Brake.Overdrive Brake  Reassembly
  1. Place the return spring on the brake piston.



    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A340F Automatic Transmission.Overdrive Brake.Overdrive Brake  Reassembly
  1. Place SST on the spring retainer, and compress the return spring with a press.

    SST
    09350-30020(09350-07030)


  1. Using a screwdriver, install the snap ring.

    NOTICE:
    Be sure the end gap of the snap ring is not aligned with the cutout portion of the overdrive support.

    HINT:
    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A340F Automatic Transmission.Overdrive Brake.Overdrive Brake  Reassembly
    After assembling the overdrive support assembly completely, align the position of the piston with A in the illustration.
    Align the end gap of the snap ring with B in the illustration.
    Make sure that the snap ring is not on the part of return spring that prevents the spring from coming off. Check this for the 8 places.


4. INSPECT PISTON OPERATION OF OVERDRIVE BRAKE


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A340F Automatic Transmission.Overdrive Brake.Overdrive Brake  Reassembly
  1. Place the overdrive support assembly onto the direct clutch assembly.

  1. Apply compressed air (392 kPa (4 kgf/cm2, 57 psi)) into the oil passage as shown, and check that the overdrive brake piston moves smoothly.