Clutch Drum And Input Shaft Assembly Inspection

Transmission. Lexus Gs430, Gs300. Uzs190 Grs190
A760E Automatic Transmission. Lexus Gs430, Gs300. Uzs190 Grs190

  1. INSPECT UNDERDRIVE 1 WAY CLUTCH ASSEMBLY

  2. INSPECT DIRECT CLUTCH RETURN SPRING SUB-ASSEMBLY

  3. INSPECT REVERSE CLUTCH RETURN SPRING SUB-ASSEMBLY

  4. INSPECT DIRECT CLUTCH DISC

  5. INSPECT PACK CLEARANCE OF DIRECT CLUTCH

  6. INSPECT PACK CLEARANCE OF REVERSE CLUTCH

  7. INSPECT FORWARD CLUTCH RETURN SPRING SUB-ASSEMBLY

  8. INSPECT COAST CLUTCH DISC

  9. INSPECT PACK CLEARANCE OF COAST CLUTCH

  10. INSPECT FORWARD CLUTCH HUB CLUTCH DISC

  11. INSPECT PACK CLEARANCE OF FORWARD CLUTCH

  12. INSPECT FORWARD CLUTCH HUB SUB-ASSEMBLY

  13. INSPECT REAR CLUTCH DISC

  14. INSPECT REVERSE CLUTCH HUB SUB-ASSEMBLY

Clutch Drum And Input Shaft Assembly -- Inspection



1. INSPECT UNDERDRIVE 1 WAY CLUTCH ASSEMBLY


    Lexus Gs430, Gs300. Uzs190 Grs190
  1. Hold the coast clutch hub and turn the 1 way clutch assembly.

  1. Check that the 1 way clutch assembly turns freely counterclockwise and locks clockwise.
    If there is a problem with the 1 way clutch, replace it.



2. INSPECT DIRECT CLUTCH RETURN SPRING SUB-ASSEMBLY


    Lexus Gs430, Gs300. Uzs190 Grs190
  1. Using vernier calipers, measure the free length of the spring together with the spring seat.

    Standard free length:
    19.51 mm (0.768 in.)
    If the free length is shorter than the standard free length, replace the clutch return spring sub-assembly.


3. INSPECT REVERSE CLUTCH RETURN SPRING SUB-ASSEMBLY


    Lexus Gs430, Gs300. Uzs190 Grs190
  1. Using vernier calipers, measure the free length of the spring together with the spring seat.

    Standard free length:
    21.04 mm (0.828 in.)
    If the free length is shorter than the standard free length, replace the clutch return spring sub-assembly.


4. INSPECT DIRECT CLUTCH DISC


    Lexus Gs430, Gs300. Uzs190 Grs190
  1. Check whether the sliding surfaces of the discs, the plates, and the flange are worn or burnt.
    If necessary, replace them.

    NOTICE:
    1. If the linings of the discs are peeled off or discolored, or even a part of the printed numbers is damaged, replace all discs.
    1. Before assembling new discs, soak them in ATF for at least 15 minutes.


5. INSPECT PACK CLEARANCE OF DIRECT CLUTCH


    Lexus Gs430, Gs300. Uzs190 Grs190.A760E Automatic Transmission.Electronic Controlled Automatic Transmission System.Clutch Drum And Input Shaft Assembly  Inspection
  1. Inspect the pack clearance of the direct clutch.

    1. Using a dial indicator, measure the moving distance (distance A) of the clutch flange at both ends across the diameter while blowing air to the oil hole as shown in the illustration, and calculate the average.

      HINT:
      Flange moving distance A = 0.26 to 1.14 mm
      Pack clearance = Flange moving distance A - 0.05 mm
      Pack Clearance:
      0.5 to 0.8 mm (0.020 to 0.031 in.)
      NOTICE:
      Install a selective flange (t = 3.4 mm) when measuring the moving distance. (shaded area in the illustration.)
    2. If the pack clearance is outside the standard, select and install a clutch flange that brings the pack clearance within the standard.

      HINT:
      There are 9 types of flanges that can be used to adjust the pack clearance. Select the one with the most appropriate thickness.
      Flange thickness:
      No.
      Thickness
      2
      3.0 mm (0.118 in.)
      3
      3.1 mm (0.122 in.)
      4
      3.2 mm (0.126 in.)
      5
      3.3 mm (0.130 in.)
      6
      3.4 mm (0.134 in.)
      7
      3.5 mm (0.138 in.)
      8
      3.6 mm (0.142 in.)
      9
      3.7 mm (0.146 in.)
      A
      3.8 mm (0.150 in.)


6. INSPECT PACK CLEARANCE OF REVERSE CLUTCH


  1. Inspect the pack clearance of the reverse clutch hub sub-assembly.



    1. Using a dial indicator, measure the reverse clutch piston stroke (distance A) and the moving distance (distance B) of the reverse clutch flange at both ends across the diameter while blowing air (392 kPa, 4 kgf/cm2, 57 psi) from the oil hole as shown in the illustration, and calculate the average.


      Lexus Gs430, Gs300. Uzs190 Grs190.A760E Automatic Transmission.Electronic Controlled Automatic Transmission System.Clutch Drum And Input Shaft Assembly  Inspection

      HINT:
      Piston stroke A = 1.05 to 2.15 mm
      Flange moving distance B = 0.72 to 1.08 mm
      Pack clearance = Piston stroke A - Flange moving distance B - 0.06
      Pack Clearance:
      0.5 to 0.8 mm (0.020 to 0.031 in.)
      NOTICE:
      Install a selective flange (t = 3.3 mm) when measuring the moving distance. (shaded area in the illustration)
    2. If the pack clearance is outside the standard, select and install a clutch flange that brings the pack clearance within the standard.

      HINT:
      There are 11 types of flanges that can be used to adjust the pack clearance. Select the one with the most appropriate thickness.
      Flange thickness:
      No.
      Thickness
      0
      2.8 mm (0.110 in.)
      1
      2.9 mm (0.114 in.)
      2
      3.0 mm (0.118 in.)
      3
      3.1 mm (0.122 in.)
      4
      3.2 mm (0.126 in.)
      5
      3.3 mm (0.130 in.)
      6
      3.4 mm (0.134 in.)
      7
      3.5 mm (0.138 in.)
      8
      3.6 mm (0.142 in.)
      9
      3.7 mm (0.146 in.)
      A
      3.8 mm (0.150 in.)


7. INSPECT FORWARD CLUTCH RETURN SPRING SUB-ASSEMBLY


    Lexus Gs430, Gs300. Uzs190 Grs190
  1. Using vernier calipers, measure the free length of the spring together with the spring seat.

    Standard free length:
    24.64 mm (0.9701 in.)
    If the free length is shorter than the standard free length, replace the clutch return spring sub-assembly.


8. INSPECT COAST CLUTCH DISC


    Lexus Gs430, Gs300. Uzs190 Grs190
  1. Check whether the sliding surfaces of the discs, the plates, and the flange are worn or burnt.
    If necessary, replace them.

    NOTICE:
    1. If the linings of the discs are peeled off or discolored, or even a part of the printed numbers is damaged, replace all discs.
    1. Before assembling new discs, soak them in ATF for at least 15 minutes.


9. INSPECT PACK CLEARANCE OF COAST CLUTCH


    Lexus Gs430, Gs300. Uzs190 Grs190.A760E Automatic Transmission.Electronic Controlled Automatic Transmission System.Clutch Drum And Input Shaft Assembly  Inspection
  1. Inspect the pack clearance of the coast clutch hub sub-assembly.

    1. Using a dial indicator, measure the moving distance (distance A) of the clutch flange at both ends across the diameter while blowing air from the oil hole as shown in the illustration, and calculate the average.

      HINT:
      Flange moving distance A = 0.38 to 1.48 mm (0.01496 to 0.0583 in.)
      Pack clearance = Flange moving distance A - 0.02 mm (0.0008 in.)
      Pack Clearance:
      0.3 to 0.6 mm (0.012 to 0.024 in.)
      NOTICE:
      Install a selective flange (t = 3.0 mm) when measuring the moving distance. (shaded area in the illustration.)
    2. If the pack clearance is outside the standard, select and install a clutch flange that brings the pack clearance within the standard.

      HINT:
      There are 10 types of flanges that can be used to adjust the pack clearance. Select the one with the most appropriate thickness.
      Flange thickness:
      No.
      Thickness
      0
      3.0 mm (0.118 in.)
      1
      3.1 mm (0.122 in.)
      2
      3.2 mm (0.126 in.)
      3
      3.3 mm (0.130 in.)
      4
      3.4 mm (0.134 in.)
      5
      3.5 mm (0.138 in.)
      6
      3.6 mm (0.142 in.)
      7
      3.7 mm (0.146 in.)
      8
      3.8 mm (0.150 in.)
      9
      3.9 mm (0.154 in.)


10. INSPECT FORWARD CLUTCH HUB CLUTCH DISC


    Lexus Gs430, Gs300. Uzs190 Grs190
  1. Check whether the sliding surfaces of the discs, the plates, and the flange are worn or burnt.
    If necessary, replace them.

    NOTICE:
    1. If the linings of the discs are peeled off or discolored, or even a part of the printed numbers is damaged, replace all discs.
    1. Before assembling new discs, soak them in ATF for at least 15 minutes.


11. INSPECT PACK CLEARANCE OF FORWARD CLUTCH


  1. Inspect the pack clearance of the forward clutch.



      Lexus Gs430, Gs300. Uzs190 Grs190.A760E Automatic Transmission.Electronic Controlled Automatic Transmission System.Clutch Drum And Input Shaft Assembly  Inspection
    1. Using a dial indicator, measure the moving distance (distance A) of the clutch flange at both ends across the diameter while blowing air from the oil hole as shown in the illustration, and calculate the average.

      HINT:
      Flange moving distance A = 0.36 to 1.50 mm
      Pack clearance = Flange moving distance A - 0.11 mm
      Pack Clearance:
      0.56 to 0.86 mm (0.0220 to 0.0339 in.)
      NOTICE:
      Install a selective flange (t = 3.4 mm) when measuring the moving distance. (shaded area in the illustration.)
    2. If the pack clearance is outside the standard, select and install a clutch flange that brings the pack clearance within the standard.

      HINT:
      There are 11 types of flanges that can be used to adjust the pack clearance. Select the one with the most appropriate thickness.
      Flange thickness:
      No.
      Thickness
      0
      3.0 mm (0.118 in.)
      1
      3.1 mm (0.122 in.)
      2
      3.2 mm (0.126 in.)
      3
      3.3 mm (0.130 in.)
      4
      3.4 mm (0.134 in.)
      5
      3.5 mm (0.138 in.)
      6
      3.6 mm (0.142 in.)
      7
      3.7 mm (0.146 in.)
      8
      3.8 mm (0.150 in.)
      9
      3.9 mm (0.154 in.)
      A
      4.0 mm (0.158 in.)


12. INSPECT FORWARD CLUTCH HUB SUB-ASSEMBLY


    Lexus Gs430, Gs300. Uzs190 Grs190
  1. Using a dial indicator, measure the inside diameter of the forward clutch hub bushing.

    Standard inside diameter:
    26.037 to 26.062 mm (1.0251 to 1.0261 in.)
    If the inside diameter is greater than the standard inside diameter, replace the forward clutch hub.


13. INSPECT REAR CLUTCH DISC


    Lexus Gs430, Gs300. Uzs190 Grs190
  1. Check whether the sliding surfaces of the discs, the plates, and the flange are worn or burnt.
    If necessary, replace them.

    NOTICE:
    1. If the linings of the discs are peeled off or discolored, or even a part of the printed numbers is damaged, replace all discs.
    1. Before assembling new discs, soak them in ATF for at least 15 minutes.


14. INSPECT REVERSE CLUTCH HUB SUB-ASSEMBLY


    Lexus Gs430, Gs300. Uzs190 Grs190
  1. Using a dial indicator, measure the inside diameter of the reverse clutch hub bushing.

    Standard inside diameter:
    35.812 to 35.837 mm (1.4099 to 1.4109 in.)
    If the inside diameter is greater than the standard inside diameter, replace the reverse clutch hub.