AUTOMATIC TRANSMISSION UNIT INSPECTION

PROCEDURE


  1. INSPECT AUTOMATIC TRANSMISSION OIL PAN SUB-ASSEMBLY

    A01XA0B

    1. Remove the magnets, and use them to collect steel particles.

    2. Carefully look at the foreign matter and particles in the pan and on the magnets to anticipate the type of wear you will find in the transmission.


      • Steel (magnetic): bearing, gear and clutch plate wear

      • Brass (non-magnetic): bush wear

  2. INSPECT NO. 2 1-WAY CLUTCH ASSEMBLY

    A01X74HE01
    *1 Lock
    *2 Free

    1. Hold the reverse clutch hub and turn the 1-way clutch assembly. Check that the 1-way clutch turns freely clockwise and locks when turned counterclockwise.

  3. INSPECT REAR CLUTCH DISC

    A01XBVE

    1. Replace all discs if one of the following problems is present: 1) a disc, plate or flange is worn or burnt, 2) the lining of a disc is peeled off or discolored, or 3) grooves have even a little bit of damage.

      Note

      Before assembling new discs, soak them in ATF for at least 2 hours.

  4. INSPECT REVERSE CLUTCH HUB SUB-ASSEMBLY

    A01X1ME

    1. Using a dial indicator, measure the inside diameter of the reverse clutch hub bush.

      Standard inside diameter
      41.912 to 41.937 mm (1.410 to 1.411 in.)

      • If the inside diameter is more than the standard, replace the reverse clutch hub.

  5. INSPECT FORWARD CLUTCH HUB SUB-ASSEMBLY

    A01WZMH

    1. Using a dial indicator, measure the inside diameter of the forward clutch hub bush.

      Standard inside diameter
      30.200 to 30.225 mm (1.189 to 1.190 in.)

      • If the inside diameter is more than the standard, replace the forward clutch hub.

  6. INSPECT NO. 4 1-WAY CLUTCH ASSEMBLY

    A01X8BQE01
    *1 Free
    *2 Lock

    1. Hold the coast clutch hub and turn the 1-way clutch assembly. Check that the 1-way clutch turns freely clockwise and locks when turned counterclockwise.

  7. INSPECT FORWARD MULTIPLE DISC CLUTCH DISC

    A01X05Z

    1. Replace all discs if one of the following problems is present: 1) a disc, plate or flange is worn or burnt, 2) the lining of a disc is peeled off or discolored, or 3) grooves or printed numbers have even a little bit of damage.

      Note

      Before assembling new discs, soak them in ATF for at least 2 hours.

  8. INSPECT COAST CLUTCH DISC

    A01X05W

    1. Replace all discs if one of the following problems is present: 1) a disc, plate or flange is worn or burnt, 2) the lining of a disc is peeled off or discolored, or 3) grooves or printed numbers have even a little bit of damage.

      Note

      Before assembling new discs, soak them in ATF for at least 2 hours.

  9. INSPECT FORWARD CLUTCH RETURN SPRING SUB-ASSEMBLY

    A01X9E4

    1. Using a vernier caliper, measure the free length of the spring together with the spring seat.

      Standard free length
      29.65 mm (1.17 in.)

  10. INSPECT DIRECT CLUTCH DISC

    A01X77R

    1. Replace all discs if one of the following problems is present: 1) a disc, plate or flange is worn or burnt, 2) the lining of a disc is peeled off or discolored, or 3) grooves or printed numbers have even a little bit of damage.

      Note

      Before assembling new discs, soak them in ATF for at least 2 hours.

  11. INSPECT REVERSE CLUTCH RETURN SPRING SUB-ASSEMBLY

    A01X8V6

    1. Using a vernier caliper, measure the free length of the spring together with the spring seat.

      Standard free length
      21.24 mm (0.836 in.)

  12. INSPECT DIRECT CLUTCH RETURN SPRING SUB-ASSEMBLY

    A01X7RU

    1. Using a vernier caliper, measure the free length of the spring together with the spring seat.

      Standard free length
      19.46 mm (0.766 in.)

  13. INSPECT NO. 3 BRAKE DISC

    A01X3WC

    1. Replace all discs if one of the following problems is present: 1) a disc, plate or flange is worn or burnt, 2) the lining of a disc is peeled off or discolored, or 3) grooves or printed numbers have even a little bit of damage.

      Note

      Before assembling new discs, soak them in ATF for at least 2 hours.

  14. INSPECT NO. 3 BRAKE PISTON RETURN SPRING SUB-ASSEMBLY

    A01WZ9Q

    1. Using a vernier caliper, measure the free length of the spring together with the spring seat.

      Standard free length
      15.72 mm (0.619 in.)

  15. INSPECT FRONT PLANETARY GEAR ASSEMBLY

    A01X4J8

    1. Using a feeler gauge, measure the front planetary pinion gear thrust clearance.

      Standard clearance
      0.2 to 0.6 mm (0.00787 to 0.0236 in.)

      • If the clearance is more than the standard, replace the front planetary gear assembly.

    2. A01X2ZB

      Using a cylinder gauge, measure the inside diameter of the front planetary gear bush.

      Standard inside diameter
      61.005 to 61.030 mm (2.402 to 2.403 in.)

      • If the inside diameter is more than the standard, replace the front planetary gear.

  16. INSPECT 1-WAY CLUTCH ASSEMBLY

    A01X2EIE01
    *1 Lock
    *2 Free

    1. Install the 1-way clutch to the 1-way clutch inner race.

    2. Hold the 1-way clutch inner race and turn the 1-way clutch. Check that the 1-way clutch turns freely counterclockwise and locks when turned clockwise.

    3. Remove the 1-way clutch from the 1-way clutch inner race.

  17. INSPECT NO. 1 BRAKE DISC

    A01XAE5

    1. Replace all discs if one of the following problems is present: 1) a disc, plate or flange is worn or burnt, 2) the lining of a disc is peeled off or discolored, or 3) grooves or printed numbers have even a little bit of damage.

      Note

      Before assembling new discs, soak them in ATF for at least 2 hours.

  18. INSPECT BRAKE PISTON RETURN SPRING SUB-ASSEMBLY

    A01XBG7

    1. Using a vernier caliper, measure the free length of the spring together with the spring seat.

      Standard free length
      17.05 mm (0.671 in.)

  19. INSPECT NO. 2 BRAKE DISC

    A01X5OO

    1. Replace all discs if one of the following problems is present: 1) a disc, plate or flange is worn or burnt, 2) the lining of a disc is peeled off or discolored, or 3) grooves or printed numbers have even a little bit of damage.

      Note

      Before assembling new discs, soak them in ATF for at least 2 hours.

  20. INSPECT NO. 2 BRAKE PISTON RETURN SPRING SUB-ASSEMBLY

    A01X0QC

    1. Using a vernier caliper, measure the free length of the spring together with the spring seat.

      Standard free length
      22.66 mm (0.892 in.)

  21. INSPECT CENTER PLANETARY GEAR ASSEMBLY

    A01XAME

    1. Using a feeler gauge, measure the center planetary pinion gear thrust clearance.

      Standard clearance
      0.20 to 0.60 mm (0.00787 to 0.0236 in.)

      • If the clearance is more than the standard, replace the center planetary gear assembly.

  22. INSPECT NO. 3 1-WAY CLUTCH ASSEMBLY

    A01X6WME01
    *1 Lock
    *2 Free

    1. Hold the rear planetary ring gear flange and turn the 1-way clutch. Check that the 1-way clutch turns freely counterclockwise and locks when turned clockwise.

  23. INSPECT INTERMEDIATE SHAFT

    A01X2FC

    1. Using a dial indicator, check the intermediate shaft runout.

      Standard runout
      0.03 mm (0.00118 in.)

      If the runout is more than the standard, replace the intermediate shaft with a new one.

    2. A01X6UDE01

      Using a micrometer, check the diameter of the intermediate shaft at the positions shown in the diagram.

      Standard diameter
      A
      19.963 to 19.976 mm (0.7859 to 0.7865 in.)
      B, C
      30.150 to 30.163 mm (1.187 to 1.188 in.)
      D, E
      36.404 to 36.420 mm (1.433 to 1.434 in.)

      If the diameter is less than the standard, replace the intermediate shaft with a new one.

  24. INSPECT NO. 4 BRAKE DISC


    1. A01X84L

      Replace all discs if one of the following problems is present: 1) a disc, plate or flange is worn or burnt, 2) the lining of a disc is peeled off or discolored, or 3) grooves or printed numbers have even a little bit of damage.

      Note

      Before assembling new discs, soak them in ATF for at least 2 hours.

  25. INSPECT REAR PLANETARY GEAR ASSEMBLY


    1. A01XB8E

      Using a feeler gauge, measure the rear planetary pinion gear thrust clearance.

      Standard clearance
      0.2 to 0.6 mm (0.00787 to 0.0236 in.)

      • If the clearance is more than the standard, replace the planetary gear assembly.

    2. A01X5HG

      Using a dial indicator, measure the inside diameter of the rear planetary gear bush.

      Standard inside diameter
      20.0 to 20.025 mm (0.787 to 0.788 in.)

      • If the inside diameter is more than the standard, replace the rear planetary gear assembly.

  26. INSPECT 1ST AND REVERSE BRAKE RETURN SPRING SUB-ASSEMBLY

    A01XB7A

    1. Using a vernier caliper, measure the free length of the spring together with the spring seat.

      Standard free length
      23.54 to 23.94 mm (0.927 to 0.943 in.)

  27. INSPECT INDIVIDUAL PISTON OPERATION

    A01X6I1E03
    *1 B4 (OUT)

    1. Check the operating sound while applying compressed air into the oil holes indicated in the illustration.

      Tech Tips

      When inspecting the direct clutch, check with the accumulator piston holes indicated in the illustration.

      If there is no sound, disassemble and check the installation condition of the parts.


      1. No. 2 clutch (C2)

      2. No. 3 clutch (C3)

      3. No. 4 clutch (C4)

      4. No. 1 clutch (C1)

      5. No. 3 brake (B3)

      6. No. 1 brake (B1)

      7. No. 2 brake (B2)

      8. No. 4 brake (B4)