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Automatic Transmission Unit: Inspection

  1. INSPECT NO. 1 BRAKE DISC 
    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 minimal damage.
      NOTE: Before assembling new discs, soak them in ATF for at least 2 hours.
      Fig 1: Inspecting No. 1 Brake Disc
      G04948688Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSPECT FRONT PLANETARY GEAR ASSEMBLY 
    1. Using a feeler gauge, measure the thrust clearance of the front planetary gear pinion.

      Standard clearance: 

      0.2 to 0.6 mm (0.008 to 0.024 in.) 

      If the clearance is not as specified, replace the front planetary gear assembly.

      Fig 2: Measuring Thrust Clearance Of Front Planetary Gear Pinion
      G04948689Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSPECT OVERDRIVE CLUTCH DISC 
    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 minimal damage.
      NOTE: Before assembling new discs, soak them in ATF for at least 2 hours.
      Fig 3: Identifying Overdrive Clutch Disc
      G04948690Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. INSPECT REVERSE CLUTCH DISC 
    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 minimal damage.
      NOTE: Before assembling new discs, soak them in ATF for at least 2 hours.
      Fig 4: Inspecting Reverse Clutch Disc
      G04948691Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. INSPECT REVERSE CLUTCH RETURN SPRING SUB-ASSEMBLY 
    1. Using a vernier caliper, measure the free length of the spring together with the spring seat.

      Standard free length: 

      22.21 mm (0.8744 in.) 

      If the free length is shorter than the standard free length, replace the reverse clutch return spring sub-assembly.

      Fig 5: Measuring Free Length Of Spring
      G04948692Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. INSPECT OVERDRIVE CLUTCH RETURN SPRING SUB-ASSEMBLY 
    1. Using a vernier caliper, measure the free length of the spring together with the spring seat.

      Standard free length: 

      21.09 mm (0.8303 in.) 

      If the free length is shorter than the standard free length, replace the overdrive clutch return spring sub-assembly.

      Fig 6: Measuring Free Length Of Spring
      G04948693Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. INSPECT OVERDRIVE DIRECT CLUTCH DRUM SUB-ASSEMBLY 
    1. Using a caliper gauge, measure the inside diameter of the overdrive direct clutch drum bush.

      Standard inside diameter (Front side): 

      67.40 to 67.44 mm (2.6535 to 2.6551 in.) 

      Standard inside diameter (Rear side): 

      55.62 to 55.64 mm (2.1898 to 2.1905 in.) 

      If the inside diameter is not as specified, replace the overdrive direct clutch drum sub-assembly.

      Fig 7: Measuring Inside Diameter Of Overdrive Direct Clutch Drum Bush
      G04948694Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  8. INSPECT FORWARD MULTIPLE CLUTCH DISC 
    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 minimal damage.
      NOTE: Before assembling new discs, soak them in ATF for at least 2 hours.
      Fig 8: Inspecting Forward Multiple Clutch Disc
      G04948695Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  9. INSPECT FORWARD CLUTCH RETURN SPRING SUB-ASSEMBLY 
    1. Using a vernier caliper, measure the free length of the spring together with the spring seat.

      Standard free length: 

      20.82 mm (0.8197 in.) 

      If the free length is shorter than the standard free length, replace the forward clutch return spring sub-assembly.

      Fig 9: Measuring Free Length Of Spring
      G04948696Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  10. INSPECT FORWARD CLUTCH DRUM SUB-ASSEMBLY 
    1. Using a caliper gauge, measure the inside diameter of the forward clutch drum bush.

      Standard inside diameter: 

      33.200 to 33.225 mm (1.3071 to 1.3081 in.) 

      If the inside diameter is not as specified, replace the forward clutch drum sub-assembly.

      Fig 10: Measuring Inside Diameter Of Forward Clutch Drum Bush
      G04948697Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  11. INSPECT SUN GEAR INPUT DRUM SUB-ASSEMBLY 
    1. Using a caliper gauge, measure the inside diameter of the sun gear input drum bush.

      Standard inside diameter: 

      45.075 to 45.100 mm (1.7746 to 1.7756 in.) 

      If the inside diameter is not as specified, replace the sun gear input drum sub-assembly.

      Fig 11: Measuring Inside Diameter Of Sun Gear Input Drum Bush
      G04948698Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  12. INSPECT REAR PLANETARY SUN GEAR ASSEMBLY 
    1. Using a caliper gauge, measure the inside diameter of the rear planetary sun gear bush.

      Standard inside diameter: 

      28.700 to 28.721 mm (1.1299 to 1.1307 in.) 

      If the inside diameter is not as specified, replace the rear planetary sun gear assembly.

      Fig 12: Measuring Inside Diameter Of Rear Planetary Sun Gear Bush
      G04948699Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  13. INSPECT REAR PLANETARY GEAR ASSEMBLY 
    1. Using a feeler gauge, measure the long and short thrust clearances of the rear planetary gear pinion.

      Standard clearance: 

      0.2 to 0.6 mm (0.008 to 0.024 in.) 

      If the clearance is not as specified, replace the rear planetary gear assembly.

      Fig 13: Measuring Long And Short Thrust Clearances Of Rear Planetary Gear Pinion
      G04948700Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Using a caliper gauge, measure the inside diameter of the rear planetary gear bush.

      Standard inside diameter (Front side): 

      71.60 to 71.63 mm (2.8189 to 2.8201 in.) 

      Standard inside diameter (Rear side): 

      28.700 to 28.721 mm (1.1299 to 1.1307 in.) 

      If the inside diameter is not as specified, replace the rear planetary gear assembly.

      Fig 14: Measuring Inside Diameter Of Rear Planetary Gear Bush
      G04948701Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  14. INSPECT NO. 1 ONE-WAY CLUTCH 
    1. Set the one-way clutch onto the rear planetary gear.
    2. Hold the rear planetary gear assembly and turn the one-way clutch.
    3. Check that the one-way clutch turns freely counterclockwise and locks when turned clockwise. If there is a problem with the No. 1 one-way clutch, replace it.
      Fig 15: Inspecting No. 1 One-Way Clutch
      G04948702Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  15. INSPECT NO. 2 BRAKE DISC 
    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 minimal damage.
      NOTE: Before assembling new discs, soak them in ATF for at least 2 hours.
      Fig 16: Inspecting No. 2 Brake Disc
      G04948703Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  16. INSPECT NO. 2 CLUTCH DISC 
    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 minimal damage.
      NOTE: Before assembling new discs, soak them in ATF for at least 2 hours.
      Fig 17: Inspecting No. 2 Clutch Disc
      G04948704Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  17. INSPECT DIRECT CLUTCH RETURN SPRING SUB-ASSEMBLY 
    1. Using a vernier caliper, measure the free length of the spring together with the spring seat.

      Standard free length: 

      20.76 mm (0.8173 in.) 

      If the free length is shorter than the standard free length, replace the direct clutch return spring sub-assembly.

      Fig 18: Measuring Free Length Of Spring
      G04948705Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  18. INSPECT NO. 2 BRAKE PISTON RETURN SPRING SUB-ASSEMBLY 
    1. Using a vernier caliper, measure the free length of the spring together with the spring seat.

      Standard free length: 

      23.36 mm (0.9197 in.) 

      If the free length is shorter than the standard free length, replace the No. 2 brake piston return spring sub-assembly.

      Fig 19: Measuring Free Length Of Spring
      G04948706Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  19. INSPECT AUTOMATIC TRANSMISSION CASE SUB-ASSEMBLY 
    1. Using a caliper gauge, measure the inside diameter of the automatic transmission case sleeve bush.

      Standard inside diameter: 

      49.07 to 49.155 mm (1.9319 to 1.9352 in.) 

      If the inside diameter is not as specified, replace the automatic transmission case sub-assembly.

      Fig 20: Measuring Inside Diameter Of Automatic Transmission Case Sleeve Bush
      G04948707Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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