AUTOMATIC TRANSMISSION UNIT INSPECTION


  1. INSPECT AUTOMATIC TRANSMISSION OIL PAN SUB-ASSEMBLY


    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 OVERDRIVE 1-WAY CLUTCH

    A01DMFZE04

    1. Hold the overdrive direct clutch drum and turn the input shaft. Check that the input shaft can be turned clockwise freely and locks when turned counterclockwise.

      Text in Illustration
      A01DQPB Lock
      A01DMKT Free

  3. INSPECT OVERDRIVE DIRECT CLUTCH DISC

    A01DSQL

    1. Replace all the 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) the grooves or printed numbers have even a little bit of damage.

      Note

      When assembling new discs, soak them in ATF for at least 15 minutes before assembly.

  4. INSPECT OVERDRIVE CLUTCH RETURN SPRING SUB-ASSEMBLY

    A01DOZQ

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

      Standard free length
      15.8 mm (0.622 in.)

      If the length is not as specified, replace the overdrive clutch return spring sub-assembly.

  5. INSPECT OVERDRIVE DIRECT CLUTCH PISTON SUB-ASSEMBLY

    A01DR5WE01

    1. Check that the check ball is free by shaking the piston.

    2. Check that the valve does not have leaks by applying low-pressure compressed air.

      If the result is not as specified, replace the overdrive direct clutch piston sub-assembly.

  6. INSPECT OVERDRIVE DIRECT CLUTCH DRUM SUB-ASSEMBLY

    A01DUGR

    1. Using a dial indicator, measure the inside diameter of the clutch drum bushes.

      Maximum inside diameter
      27.11 mm (1.07 in.)

      If the inside diameter is more than the maximum, replace the overdrive direct clutch drum sub-assembly.

  7. INSPECT OVERDRIVE PLANETARY GEAR ASSEMBLY

    A01DU9NE01

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

      Maximum inside diameter
      11.2 to 11.221 mm (0.441 to 0.442 in.)

      If the inside diameter is more than the maximum, replace the overdrive planetary gear assembly.

    2. A01DQMRE01

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

      Standard clearance
      0.20 to 0.60 mm (0.00787 to 0.0236 in.)
      Maximum clearance
      0.65 mm (0.0256 in.)

      If the clearance is more than the maximum, replace the overdrive planetary gear assembly.

  8. INSPECT OVERDRIVE BRAKE DISC

    A01DOZZ

    1. Replace all the 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) the grooves or printed numbers have even a little bit of damage.

      Note

      When assembling new discs, soak them in ATF for at least 15 minutes before assembly.

  9. INSPECT PISTON OPERATION OF OVERDRIVE BRAKE

    A01DSCPE01

    1. Place the overdrive support assembly to the direct clutch assembly.

    2. A01DMK1E01

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

  10. INSPECT OVERDRIVE BRAKE RETURN SPRING SUB-ASSEMBLY

    A01DRTL

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

      Standard free length
      17.03 mm (0.671 in.)

      If the length is not as specified, replace the overdrive brake return spring sub-assembly.

  11. INSPECT DIRECT CLUTCH DISC

    A01DNVW

    1. Replace all the 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) the grooves or printed numbers have even a little bit of damage.

      Note

      When assembling new discs, soak them in ATF for at least 15 minutes before assembly.

  12. INSPECT DIRECT CLUTCH RETURN SPRING SUB-ASSEMBLY

    A01DNRE

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

      Standard free length
      21.32 mm (0.839 in.)

      If the length is not as specified, replace the direct clutch return spring sub-assembly.

  13. INSPECT DIRECT CLUTCH PISTON SUB-ASSEMBLY

    A01DS61E01

    1. Check that the check ball is free by shaking the piston.

    2. Check that the valve does not have leaks by applying low-pressure compressed air.

  14. INSPECT DIRECT CLUTCH DRUM SUB-ASSEMBLY

    A01DPBUE01

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

      Standard inside diameter
      53.915 to 53.94 mm (2.123 to 2.124 in.)
      Maximum inside diameter
      53.99 mm (2.13 in.)

      If the inside diameter is more than the maximum, replace the direct clutch drum sub-assembly.

  15. INSPECT FORWARD CLUTCH DISC

    A01DQQT

    1. Replace all the 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) the grooves or printed numbers have even a little bit of damage.

      Note

      When assembling new discs, soak them in ATF for at least 15 minutes before assembly.

  16. INSPECT FORWARD CLUTCH PISTON SUB-ASSEMBLY

    A01DS61E01

    1. Check that the check ball is free by shaking the piston.

    2. Check that the valve does not have leaks by applying low-pressure compressed air.

  17. INSPECT INPUT SHAFT SUB-ASSEMBLY

    A01DOA4E01

    1. Using a dial indicator, measure the inside diameter of the input shaft bush.

      Standard inside diameter
      24.0 to 24.026 mm (0.945 to 0.946 in.)
      Maximum inside diameter
      24.076 mm (0.948 in.)

      If the inside diameter is more than the maximum, replace the input shaft sub-assembly.

  18. INSPECT FORWARD CLUTCH RETURN SPRING SUB-ASSEMBLY

    A01DMSR

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

      Standard free length
      19.47 mm (0.767 in.)

      If the length is not as specified, replace the forward clutch return spring sub-assembly.

  19. INSPECT SECOND COAST BRAKE PISTON ROD

    A01DTVQE01

    1. Check the piston rod length.

      Tech Tips

      There are 2 different standard lengths for the piston rod.

      Piston Rod Length
      Groove Mark Length
      Without 78.3 to 78.5 mm (3.08 to 3.09 in.)
      With 79.8 to 80.0 mm (3.14 to 3.15 in.)

      If the length is not as specified, replace the rod with a new one even if the brake band works normally.

  20. INSPECT SECOND COAST BRAKE BAND ASSEMBLY

    A01DTUZE04
    Text in Illustration
    *1 Printed Number

    Note


    • If the lining of the brake band is peeled off or discolored, or if any part of the printed numbers are damaged, replace the brake band.

    • When installing a new band, soak it in ATF for at least 15 minutes before installation.

  21. INSPECT FRONT PLANETARY RING GEAR SUB-ASSEMBLY

    A01DR2ZE01

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

      Standard inside diameter
      24.0 to 24.026 mm (0.945 to 0.946 in.)
      Maximum inside diameter
      24.076 mm (0.948 in.)

      If the inside diameter is more than the maximum, replace the front planetary ring gear sub-assembly.

  22. INSPECT FRONT PLANETARY GEAR ASSEMBLY

    A01DO2CE01

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

      Standard clearance
      0.20 to 0.60 mm (0.00787 to 0.0236 in.)
      Maximum clearance
      0.65 mm (0.0256 in.)

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

  23. INSPECT NO. 1 1-WAY CLUTCH ASSEMBLY

    A01DPZ4E03

    1. Hold the planetary sun gear, and turn the 1-way clutch assembly. Check that the 1-way clutch hub can be turned clockwise freely and locks when turned counterclockwise.

      Text in Illustration
      A01DQPB Lock
      A01DMKT Free

  24. INSPECT PLANETARY SUN GEAR SUB-ASSEMBLY

    A01DPMSE01

    1. Using a dial indicator, measure the inside diameter of the planetary sun gear bushes.

      Standard inside diameter
      27.00 to 27.026 mm (1.063 to 1.064 in.)
      Maximum inside diameter
      27.076 mm (1.07 in.)

      If the inside diameter is more than the maximum, replace the planetary sun gear sub-assembly.

  25. INSPECT SECOND BRAKE PISTON

    A01DQVME01

    1. Check that the second brake piston moves smoothly when applying compressed air to and releasing low-pressure compressed air from the second brake drum.

  26. INSPECT SECOND BRAKE DISC

    A01DNL9

    1. Replace all the 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) the grooves or printed numbers have even a little bit of damage.

      Note

      When assembling new discs, soak them in ATF for at least 15 minutes before assembly.

  27. INSPECT SECOND BRAKE PISTON RETURN SPRING SUB-ASSEMBLY

    A01DQIY

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

      Standard free length
      16.05 mm (0.632 in.)

      If the length is not as specified, replace the second brake piston return spring sub-assembly.

  28. INSPECT FIRST AND REVERSE BRAKE DISC

    A01DRED

    1. Replace all the 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) the grooves or printed numbers have even a little bit of damage.

      Note

      When assembling new discs, soak them in ATF for at least 15 minutes before assembly.

  29. INSPECT NO. 2 1-WAY CLUTCH

    A01DS4BE04

    1. Hold the planetary gear and turn the 1-way clutch inner race. Check that the 1-way clutch inner race can be turned counterclockwise freely and locks when turned clockwise.

      Text in Illustration
      A01DQPB Lock
      A01DMKT Free

  30. INSPECT REAR PLANETARY GEAR ASSEMBLY

    A01DNMGE01

    1. Using a feeler gauge, measure the thrust clearance.

      Standard clearance
      0.20 to 0.60 mm (0.00797 to 0.0236 in.)
      Maximum clearance
      0.65 mm (0.0256 in.)

      If the clearance is more than the maximum, replace the rear planetary gear assembly.

  31. INSPECT FIRST AND REVERSE BRAKE RETURN SPRING SUB-ASSEMBLY

    A01DUGD

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

      Standard free length
      18.182 to 18.582 mm (0.716 to 0.732 in.)

      If the length is not as specified, replace the first and reverse brake return spring sub-assembly.

  32. INSPECT TRANSMISSION CASE BUSH

    A01DME9E01

    1. Using a cylinder gauge, measure the inside diameter of the transmission case rear bush.

      Standard inside diameter
      38.113 to 38.138 mm (1.5005 to 1.5014 in.)
      Maximum inside diameter
      38.19 mm (1.50 in.)

      If the inside diameter is more than the maximum, replace the automatic transmission case sub-assembly.

  33. INSPECT PISTON OPERATION OF FIRST AND REVERSE BRAKE

    A01DNRFE02

    1. Make sure the first and reverse brake pistons move smoothly when compressed air is applied into the transmission case.

  34. INSPECT PISTON OPERATION OF SECOND COAST BRAKE

    A01DSTQE04

    1. Place a mark on the 2nd coast brake piston rod.

      Text in Illustration
      *1 Mark
      *2 Piston Rod
    2. A01DT4NE02

      Using SST, measure the stroke while applying and releasing compressed air (392 kPa (4.0 kgf/cm2, 57 psi)).

      SST
      09240-00020
      Standard piston stroke
      1.5 to 3.0 mm (0.059 to 0.118 in.)

      If the stroke is not as specified, replace the brake band with a new one.

  35. INSPECT OUTPUT SHAFT END PLAY

    A01DQVRE01

    1. Using a dial indicator, measure the end play of the output shaft while moving it by hand.

      Standard end play
      0.30 to 1.04 mm (0.0118 to 0.0409 in.)

      If the end play is not as specified, check for improper installation.

    2. Check that the output shaft rotates smoothly.