Underdrive Clutch Disassembly

Transmission. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
U151F Automatic Transaxle. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

  1. INSPECT UNDERDRIVE PACK CLEARANCE

  2. REMOVE UNDERDRIVE CLUTCH FLANGE NO. 2 HOLE SNAP RING

  3. REMOVE NO. 1 UNDERDRIVE CLUTCH DISC

  4. REMOVE UNDERDRIVE CLUTCH RETURN SPRING SUB-ASSEMBLY

  5. REMOVE UNDERDRIVE CLUTCH PISTON SET

  6. REMOVE UNDERDRIVE CLUTCH DRUM O-RING

Underdrive Clutch -- Disassembly



1. INSPECT UNDERDRIVE PACK CLEARANCE


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.U151F Automatic Transaxle.Automatic Transaxle System.Underdrive Clutch  Disassembly
  1. Install the underdrive clutch to the transaxle case.

    NOTICE:
    Be careful not to damage the oil seal rings.
  1. Install a dial indicator as shown in the illustration.

  1. Measure the underdrive clutch pack clearance while applying and releasing compressed air (392 kPa, 4.0 kgf/cm2, 57 psi).

    Standard pack clearance:
    1.51 to 1.71 mm (0.0594 to 0.0673 in.)
    If the pack clearance is not as specified, inspect the discs, plates and flange.
    HINT:
    There are 5 different thicknesses of flanges available.
    Standard flange thickness:
    Mark
    Thickness
    Mark
    Thickness
    1
    3.0 mm (0.118 in.)
    4
    3.6 mm (0.142 in.)
    2
    3.2 mm (0.126 in.)
    5
    3.8 mm (0.150 in.)
    3
    3.4 mm (0.134 in.)
    -
    -


2. REMOVE UNDERDRIVE CLUTCH FLANGE NO. 2 HOLE SNAP RING


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.U151F Automatic Transaxle.Automatic Transaxle System.Underdrive Clutch  Disassembly
  1. Using a screwdriver, remove the snap ring.



3. REMOVE NO. 1 UNDERDRIVE CLUTCH DISC


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.U151F Automatic Transaxle.Automatic Transaxle System.Underdrive Clutch  Disassembly
  1. Remove the flange, 4 discs and 4 plates from the underdrive clutch drum.



4. REMOVE UNDERDRIVE CLUTCH RETURN SPRING SUB-ASSEMBLY


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.U151F Automatic Transaxle.Automatic Transaxle System.Underdrive Clutch  Disassembly
  1. Place SST on the clutch balancer and compress the spring with a press.

    SST
    09350-32014
  1. Using a snap ring expander, remove the snap ring.

    NOTICE:
    1. Stop the press when the spring seat is lowered to a position 1 to 2 mm (0.039 to 0.078 in.) from the snap ring groove. This prevents the spring seat from being deformed.
    2. Do not expand the snap ring excessively.


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.U151F Automatic Transaxle.Automatic Transaxle System.Underdrive Clutch  Disassembly
  1. Remove the clutch balancer from the underdrive clutch drum.



    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.U151F Automatic Transaxle.Automatic Transaxle System.Underdrive Clutch  Disassembly
  1. Remove the return spring from the underdrive clutch drum.



5. REMOVE UNDERDRIVE CLUTCH PISTON SET


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.U151F Automatic Transaxle.Automatic Transaxle System.Underdrive Clutch  Disassembly
  1. Install the underdrive clutch to the transaxle case.

    NOTICE:
    Be careful not to damage the oil seal ring.
  1. Holding the underdrive clutch piston by hand, apply compressed air (392 kPa, 4.0 kgf/cm2, 57 psi) to the transaxle case to remove the underdrive clutch piston.



6. REMOVE UNDERDRIVE CLUTCH DRUM O-RING


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.U151F Automatic Transaxle.Automatic Transaxle System.Underdrive Clutch  Disassembly
  1. Using a screwdriver, remove the O-ring from the underdrive clutch drum.