lemon-mirror:
Home >> Infiniti >> 2011 >> QX56 AWD >> Repair and Diagnosis >> Transmission >> Automatic Transmission >> Unit Disassembly And Assembly >> Transmission Assembly >> Disassembly

Transmission Assembly: Disassembly

CAUTION: Never disassemble parts behind drum support. Refer to "TRANSMISSION : CROSS-SECTIONAL VIEW ".
  1. Drain ATF through drain plug.
  2. Remove torque converter by holding it firmly and turning while pulling straight out.
    Fig 1: Removing Torque Converter
    G07023131Courtesy of NISSAN MOTOR CO., U.S.A.
  3. Remove tightening bolts for converter housing and transmission case.
  4. Remove converter housing from transmission case.
    CAUTION: Be careful not to scratch converter housing.
    Fig 2: Locating Converter Housing Bolts
    G07023132Courtesy of NISSAN MOTOR CO., U.S.A.
  5. Remove O-ring from input clutch assembly.
    Fig 3: Identifying Input Clutch Assembly O-Ring
    G07023133Courtesy of NISSAN MOTOR CO., U.S.A.
  6. Remove tightening bolts for oil pump assembly and transmission case.
    Fig 4: Locating Oil Pump Assembly Bolts
    G07023134Courtesy of NISSAN MOTOR CO., U.S.A.
  7. Attach the sliding hammers [SST: ST25850000 (J-25721-A)] (A) to oil pump assembly (1) and extract it evenly from transmission case.
    CAUTION:
    • Fully tighten the sliding hammer screws.
    • Make sure that bearing race is installed to the oil pump assembly edge surface.
      Fig 5: Identifying Oil Pump Assembly
      G07023135Courtesy of NISSAN MOTOR CO., U.S.A.
  8. Remove O-ring (1) from oil pump assembly.
    Fig 6: Identifying Oil Pump Assembly O-Ring
    G07023136Courtesy of NISSAN MOTOR CO., U.S.A.
  9. Remove bearing race (1) from oil pump assembly.
    Fig 7: Identifying Bearing Race
    G07023137Courtesy of NISSAN MOTOR CO., U.S.A.
  10. Remove seal ring (1) from oil pump assembly.
    Fig 8: Identifying Seal Ring
    G07023138Courtesy of NISSAN MOTOR CO., U.S.A.
  11. Remove under drive sun gear (1) from under drive carrier assembly.
    Fig 9: Identifying Under Drive Sun Gear
    G07023139Courtesy of NISSAN MOTOR CO., U.S.A.
  12. Remove needle bearing (1) from under drive sun gear.
    Fig 10: Removing Needle Bearing From Under Drive Sun Gear
    G07023140Courtesy of NISSAN MOTOR CO., U.S.A.
  13. Remove needle bearing (1) from under drive carrier assembly.
    Fig 11: Identifying Needle Bearing
    G07023141Courtesy of NISSAN MOTOR CO., U.S.A.
  14. Remove front brake retaining plate, front brake drive plates, front brake driven plates, and front brake dish plate from transmission case by using a wire (A) with its tip bent like a hook.
    Fig 12: Removing Front Brake Retaining Plate
    G07023142Courtesy of NISSAN MOTOR CO., U.S.A.
  15. Remove snap ring (1) from transmission case using a flat-bladed screwdriver.
    CAUTION:
    • Be careful not to scratch transmission case and 1st one-way clutch.
    • Be careful not to damage snap ring.
      Fig 13: Removing Snap Ring
      G07023143Courtesy of NISSAN MOTOR CO., U.S.A.
  16. Remove input clutch assembly (with 1st one-way clutch, under drive carrier assembly, front brake hub, front carrier assembly, and rear internal gear) (1) from transmission case.
    Fig 14: Removing Input Clutch Assembly
    G07023144Courtesy of NISSAN MOTOR CO., U.S.A.
  17. Remove 1st one-way clutch (1) from front brake hub.
    Fig 15: Removing 1St One-Way Clutch From Front Brake Hub
    G07023145Courtesy of NISSAN MOTOR CO., U.S.A.
  18. Remove under drive carrier assembly (with front brake hub) (1) from front carrier assembly.
    Fig 16: Identifying Under Drive Carrier Assembly
    G07023146Courtesy of NISSAN MOTOR CO., U.S.A.
  19. Remove needle bearing (1) from front carrier assembly.
    Fig 17: Identifying Needle Bearing
    G07023147Courtesy of NISSAN MOTOR CO., U.S.A.
  20. Remove seal rings (1) from input clutch assembly.
    Fig 18: Identifying Seal Rings
    G07023148Courtesy of NISSAN MOTOR CO., U.S.A.
  21. Remove mid carrier assembly and rear carrier assembly as a unit.
    Fig 19: Identifying Mid Carrier Assembly
    G07023149Courtesy of NISSAN MOTOR CO., U.S.A.
  22. Remove mid carrier assembly from rear carrier assembly.
    Fig 20: Removing Mid Carrier Assembly From Rear Carrier Assembly
    G07023150Courtesy of NISSAN MOTOR CO., U.S.A.
  23. Remove needle bearing (front side) from mid carrier assembly.
    Fig 21: Removing Needle Bearing
    G07023151Courtesy of NISSAN MOTOR CO., U.S.A.
  24. Remove needle bearing (rear side) from mid carrier assembly.
    Fig 22: Removing Needle Bearing
    G07023152Courtesy of NISSAN MOTOR CO., U.S.A.
  25. Remove bearing race from rear carrier assembly.
    Fig 23: Removing Bearing Race From Rear Carrier Assembly
    G07023153Courtesy of NISSAN MOTOR CO., U.S.A.
  26. Remove needle bearing from rear carrier assembly.
    Fig 24: Removing Needle Bearing From Rear Carrier Assembly
    G07023154Courtesy of NISSAN MOTOR CO., U.S.A.
  27. Remove mid sun gear assembly, rear sun gear assembly, and high and low reverse clutch hub as a unit.
    CAUTION: Be careful to remove then with bearing race and needle bearing.
    Fig 25: Removing Mid Sun Gear Assembly
    G07023155Courtesy of NISSAN MOTOR CO., U.S.A.
  28. Remove high and low reverse clutch assembly from direct clutch assembly.
    CAUTION: Make sure that needle bearing is installed to the high and low reverse clutch assembly edge surface.
    Fig 26: Identifying High And Low Reverse Clutch Assembly
    G07023156Courtesy of NISSAN MOTOR CO., U.S.A.
  29. Remove direct clutch assembly from reverse brake.
    Fig 27: Identifying Direct Clutch Assembly
    G07023157Courtesy of NISSAN MOTOR CO., U.S.A.
  30. Remove needle bearing from drum support.
    Fig 28: Identifying Needle Bearing
    G07023158Courtesy of NISSAN MOTOR CO., U.S.A.
  31. Remove snap ring (1) from joint connector (A).
    Fig 29: Removing Snap Ring From Joint Connector
    G07023159Courtesy of NISSAN MOTOR CO., U.S.A.
  32. Push joint connector (A).
    CAUTION: Be careful not to damage connector.
    Fig 30: Identifying Joint Connector
    G07023160Courtesy of NISSAN MOTOR CO., U.S.A.
  33. Remove clips (1) and oil pan mounting bolts.
  34. Remove oil pan (2) and oil pan gasket.
    Fig 31: Identifying Clips And Oil Pan Mounting Bolts
    G07023161Courtesy of NISSAN MOTOR CO., U.S.A.
  35. Remove magnets (1) from oil pan.
    Fig 32: Identifying Magnets
    G07023162Courtesy of NISSAN MOTOR CO., U.S.A.
  36. Disconnect output speed sensor connector (A).
    CAUTION: Be careful not to damage connector.
  37. Disengage terminal clips.
    Fig 33: Disengaging Terminal Clips
    G07023163Courtesy of NISSAN MOTOR CO., U.S.A.
  38. Remove control valve & TCM mounting bolts and clip (1) from the control valve & TCM.
    Fig 34: Identifying Control Valve And TCM Mounting Bolts And Clip
    G07023164Courtesy of NISSAN MOTOR CO., U.S.A.
    BOLT SPECIFICATION

    Bolt symbol Length mm (in) Number of bolts
    A 43 (1.69) 3
    B 40 (1.57) 2
    C 54 (2.13) 6
    D 50 (1.97) 2
    E(1) 50 (1.97) 1
    (1) Reamer bolt
  39. Remove the control valve & TCM (1) from transmission case.
    CAUTION: When removing, never with the manual valve notch and manual plate height. Remove it vertically.
    Fig 35: Removing Control Valve And TCM From Transmission Case
    G07023165Courtesy of NISSAN MOTOR CO., U.S.A.
  40. Remove joint connector (1) from the control valve & TCM using a flat-bladed screwdriver (A).
    Fig 36: Removing Joint Connector
    G07023166Courtesy of NISSAN MOTOR CO., U.S.A.
  41. Disconnect TCM connector (A).
    CAUTION: Be careful not to damage connector.
    Fig 37: Identifying TCM Connector
    G07023167Courtesy of NISSAN MOTOR CO., U.S.A.
  42. Remove rear extension assembly (2WD) or adapter case assembly (4WD) according to the following procedures.
    1. 2WD 
      1. Remove tightening bolts for rear extension assembly and transmission case.
        Fig 38: Identifying Bracket
        G07023168Courtesy of NISSAN MOTOR CO., U.S.A.
      2. Tap rear extension assembly using a soft hammer.
        CAUTION: Be careful not to damage adapter case.
        Fig 39: Tapping Rear Extension Assembly
        G07023169Courtesy of NISSAN MOTOR CO., U.S.A.
      3. Remove rear extension assembly from transmission case. (With needle bearing.)
        Fig 40: Removing Rear Extension Assembly From Transmission Case
        G07023170Courtesy of NISSAN MOTOR CO., U.S.A.
      4. Remove bearing race from output shaft.
        Fig 41: Removing Bearing Race From Output Shaft
        G07023171Courtesy of NISSAN MOTOR CO., U.S.A.
      5. Remove output shaft from transmission case by rotating left/right.
        Fig 42: Removing Output Shaft From Transmission Case
        G07023172Courtesy of NISSAN MOTOR CO., U.S.A.
      6. Remove parking gear (1) from output shaft (2).
        Fig 43: Removing Parking Gear From Output Shaft
        G07023173Courtesy of NISSAN MOTOR CO., U.S.A.
      7. Remove seal rings (1) from output shaft.
        Fig 44: Removing Seal Rings From Output Shaft
        G07023174Courtesy of NISSAN MOTOR CO., U.S.A.
    2. 4WD 
      1. Remove tightening bolts for adapter case assembly and transmission case.
        Fig 45: Identifying Adapter Case Assembly Bolts
        G07023175Courtesy of NISSAN MOTOR CO., U.S.A.
      2. Tap adapter case assembly using a soft hammer.
        CAUTION: Be careful not to damage adapter case.
        Fig 46: Tapping Adapter Case Assembly
        G07023176Courtesy of NISSAN MOTOR CO., U.S.A.
      3. Remove adapter case assembly from transmission case. (With needle bearing)
        Fig 47: Removing Adapter Case Assembly From Transmission Case
        G07023177Courtesy of NISSAN MOTOR CO., U.S.A.
      4. Remove bearing race from output shaft.
        Fig 48: Removing Bearing Race From Output Shaft
        G07023178Courtesy of NISSAN MOTOR CO., U.S.A.
      5. Remove output shaft from transmission case by rotating left/right.
        Fig 49: Removing Output Shaft From Transmission Case
        G07023179Courtesy of NISSAN MOTOR CO., U.S.A.
      6. Remove gasket from transmission case.
        Fig 50: Removing Gasket From Transmission Case.
        G07023180Courtesy of NISSAN MOTOR CO., U.S.A.
      7. Remove parking gear (1) from output shaft (2).
        Fig 51: Removing Parking Gear From Output Shaft
        G07023181Courtesy of NISSAN MOTOR CO., U.S.A.
      8. Remove seal rings (1) from output shaft.
        Fig 52: Removing Seal Rings From Output Shaft
        G07023182Courtesy of NISSAN MOTOR CO., U.S.A.
  43. Remove needle bearing from transmission case.
    Fig 53: Removing Needle Bearing From Transmission Case
    G07023183Courtesy of NISSAN MOTOR CO., U.S.A.
  44. Remove output speed sensor (1) from transmission case.
    Fig 54: Removing Output Speed Sensor From Transmission Case
    G07023184Courtesy of NISSAN MOTOR CO., U.S.A.
    CAUTION:
    • Never subject it to impact by dropping or hitting it.
    • Never disassemble.
    • Never allow metal filings, etc. to get on the sensor's front edge magnetic area.
    • Never place in an area affected by magnetism.
  45. Remove reverse brake snap ring (fixing plate) with 2 flat-bladed screwdrivers.
    CAUTION:
    • Be careful not to scratch transmission case and reverse brake retaining plate.
    • Be careful not to damage snap ring.
    NOTE: Press out snap ring from the transmission case oil pan side gap with a flat-bladed screwdriver, and remove it using a another screwdriver.
    Fig 55: Removing Reverse Brake Snap Ring
    G07023185Courtesy of NISSAN MOTOR CO., U.S.A.
  46. Remove reverse brake retaining plate from transmission case.
  47. Remove N-spring from transmission case.
    Fig 56: Identifying N-Spring
    G07023186Courtesy of NISSAN MOTOR CO., U.S.A.
  48. Remove reverse brake drive plates, driven plates, dish plates, and retaining plate transmission case.
    Fig 57: Removing Reverse Brake Drive Plates
    G07023187Courtesy of NISSAN MOTOR CO., U.S.A.
  49. Remove snap ring (fixing spring retainer) using a flat-bladed screwdriver.
    CAUTION:
    • Be careful not to scratch transmission case and spring retainer.
    • Be careful not to damage snap ring.
      Fig 58: Identifying Snap Ring
      G07023188Courtesy of NISSAN MOTOR CO., U.S.A.
  50. Remove reverse brake spring retainer and reverse brake return spring from transmission case.
    Fig 59: Identifying Reverse Brake Spring Retainer
    G07023189Courtesy of NISSAN MOTOR CO., U.S.A.
  51. Remove seal rings from drum support.
    Fig 60: Identifying Seal Rings
    G07023190Courtesy of NISSAN MOTOR CO., U.S.A.
  52. Remove needle bearing from drum support edge surface.
    Fig 61: Identifying Needle Bearing
    G07023191Courtesy of NISSAN MOTOR CO., U.S.A.
  53. Remove reverse brake piston (1) from transmission case with compressed air. Refer to "OIL CHANNEL ".
    CAUTION: Care should be taken not to abruptly blow air. It makes pistons incline, as the result, it becomes hard to disassemble the pistons.
    Fig 62: Identifying Reverse Brake Piston
    G07023192Courtesy of NISSAN MOTOR CO., U.S.A.
  54. Remove D-rings from reverse brake piston.
    Fig 63: Identifying D-Rings And Reverse Brake Piston
    G07023193Courtesy of NISSAN MOTOR CO., U.S.A.
  55. Remove manual shaft retaining pin with pair of nippers.
    CAUTION: Be careful not to cut retaining pin.
    Fig 64: Identifying Manual Shaft Retaining Pin
    G07023194Courtesy of NISSAN MOTOR CO., U.S.A.
  56. Remove manual plate (1) from detent spring (2).
  57. Remove parking rod (3) from manual plate.
  58. Install manual plate to detent spring.
    Fig 65: Identifying Manual Plate And Parking Rod
    G07023195Courtesy of NISSAN MOTOR CO., U.S.A.
  59. Use a pin punch [4 mm (0.16 in) dia. commercial service tool] to knock out retaining pin (1).
    Fig 66: Identifying Retaining Pin
    G07023196Courtesy of NISSAN MOTOR CO., U.S.A.
  60. Remove manual plate from manual shaft.
    Fig 67: Identifying Manual Plate
    G07023197Courtesy of NISSAN MOTOR CO., U.S.A.
  61. Remove manual shaft from transmission case.
    Fig 68: Identifying Manual Shaft
    G07023198Courtesy of NISSAN MOTOR CO., U.S.A.
  62. Remove manual shaft oil seals using a flat-bladed screwdriver.
    CAUTION: Be careful not to scratch transmission case.
    Fig 69: Identifying Manual Shaft Oil Seals
    G07023199Courtesy of NISSAN MOTOR CO., U.S.A.
  63. Remove detent spring (1) from transmission case.
    Fig 70: Identifying Detent Spring
    G07023200Courtesy of NISSAN MOTOR CO., U.S.A.
  64. Remove needle bearing (1) from rear extension (2WD) or adapter case (4WD).
    Fig 71: Identifying Needle Bearing
    G07023201Courtesy of NISSAN MOTOR CO., U.S.A.
  65. Remove parking actuator support from rear extension (2WD) or adapter case (4WD).
    Fig 72: Identifying Parking Actuator Support
    G07023202Courtesy of NISSAN MOTOR CO., U.S.A.
  66. Remove parking pawl (with return spring) and pawl shaft from rear extension (2WD) or adapter case (4WD).
    Fig 73: Identifying Parking Pawl And Pawl Shaft
    G07023203Courtesy of NISSAN MOTOR CO., U.S.A.
  67. Remove return spring (1) from parking pawl (2).
    Fig 74: Identifying Return Spring And Parking Pawl
    G07023204Courtesy of NISSAN MOTOR CO., U.S.A.
  68. Remove rear oil seal from rear extension (B) or adapter case (C) using a flat-bladed screwdriver (A).
    CAUTION: Be careful not to scratch adapter case.
    Fig 75: Removing Rear Oil Seal From Rear Extension
    G07023205Courtesy of NISSAN MOTOR CO., U.S.A.
· About lemon-mirror