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Home >> Infiniti >> 2012 >> G37 IPL, Automatic Trans >> Repair and Diagnosis >> Transmission >> Automatic Transmission (Coupe) >> Unit Disassembly And Assembly >> Transmission Assembly >> Disassembly

Transmission Assembly: Disassembly

CAUTION: Never disassemble parts behind drum support. Refer to "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/Installing Torque Converter
    G07013603Courtesy of NISSAN NORTH AMERICA, INC.
  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: Identifying Converter Housing Mounting Bolts
    G07013604Courtesy of NISSAN NORTH AMERICA, INC.
  5. Remove O-ring from input clutch assembly.
    Fig 3: Identifying Input Clutch Assembly O-Ring
    G07013605Courtesy of NISSAN NORTH AMERICA, INC.
  6. Remove tightening bolts (<==) for oil pump assembly and transmission case.
    Fig 4: Identifying Oil Pump Assembly Mounting Bolts
    G07013606Courtesy of NISSAN NORTH AMERICA, INC.
  7. Attach the sliding hammers [SST: ST25850000 (J-25721-A)] (A) to oil pump assembly (1) and extract it evenly from transmission case.
    Fig 5: Connecting Sliding Hammer To Oil Pump Assembly
    G08233537Courtesy of NISSAN NORTH AMERICA, INC.
    CAUTION:
    • Fully tighten the sliding hammer screws.
    • Make sure that bearing race is installed to the oil pump assembly edge surface.
  8. Remove O-ring (1) from oil pump assembly.
    Fig 6: Identifying Oil Pump Assembly O-Ring
    G07016104Courtesy of NISSAN NORTH AMERICA, INC.
  9. Remove bearing race (1) from oil pump assembly.
    Fig 7: Identifying Oil Pump Assembly Bearing Race
    G07016105Courtesy of NISSAN NORTH AMERICA, INC.
  10. Remove seal ring (1) from oil pump assembly.
    Fig 8: Identifying Oil Pump Assembly Seal Ring
    G07016106Courtesy of NISSAN NORTH AMERICA, INC.
  11. Remove under drive sun gear (1) from under drive carrier assembly.
    Fig 9: Identifying Drive Carrier Assembly Sun Gear
    G07016107Courtesy of NISSAN NORTH AMERICA, INC.
  12. Remove needle bearing (1) from under drive sun gear.
    Fig 10: Removing/Installing Drive Sun Gear Needle Bearing
    G07016108Courtesy of NISSAN NORTH AMERICA, INC.
  13. Remove needle bearing (1) from under drive carrier assembly.
    Fig 11: Identifying Drive Carrier Assembly Needle Bearing
    G07016109Courtesy of NISSAN NORTH AMERICA, INC.
  14. Remove front brake component part (retaining plates, drive plates and driven plate) from transmission case by using a wire (A) with its tip bent like a hook.
    Fig 12: Removing Front Brake Components Using Wire
    G07016110Courtesy of NISSAN NORTH AMERICA, INC.
  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: Identifying Transmission Case Snap Ring
      G07016111Courtesy of NISSAN NORTH AMERICA, INC.
  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 From Transmission Case
    G07016112Courtesy of NISSAN NORTH AMERICA, INC.
  17. Remove 1st one-way clutch (1) from front brake hub.
    Fig 15: Identifying Front Brake Hub 1st One-Way Clutch
    G07016113Courtesy of NISSAN NORTH AMERICA, INC.
  18. Remove under drive carrier assembly (with front brake hub) (1) from front carrier assembly.
    Fig 16: Identifying Drive Carrier Assembly
    G07016114Courtesy of NISSAN NORTH AMERICA, INC.
  19. Remove needle bearing (1) from front carrier assembly.
    Fig 17: Identifying Front Carrier Assembly Needle Bearing
    G07016115Courtesy of NISSAN NORTH AMERICA, INC.
  20. Remove seal rings (1) from input clutch assembly.
    Fig 18: Identifying Input Clutch Assembly Seal Rings
    G07016116Courtesy of NISSAN NORTH AMERICA, INC.
  21. Remove mid carrier assembly and rear carrier assembly as a unit.
    Fig 19: Identifying Mid Carrier Assembly
    G07016117Courtesy of NISSAN NORTH AMERICA, INC.
  22. Remove mid carrier assembly from rear carrier assembly.
    Fig 20: Removing Mid Carrier Assembly From Rear Carrier Assembly
    G07016118Courtesy of NISSAN NORTH AMERICA, INC.
  23. Remove needle bearing (front side) from mid carrier assembly.
    Fig 21: Removing/Installing Mid Carrier Assembly (Front Side) Needle Bearing
    G07016119Courtesy of NISSAN NORTH AMERICA, INC.
  24. Remove needle bearing (rear side) from mid carrier assembly.
    Fig 22: Removing/Installing Mid Carrier Assembly (Rear Side) Needle Bearing
    G07016120Courtesy of NISSAN NORTH AMERICA, INC.
  25. Remove bearing race from rear carrier assembly.
    Fig 23: Removing/Installing Rear Carrier Assembly Bearing Race
    G07016121Courtesy of NISSAN NORTH AMERICA, INC.
  26. Remove needle bearing from rear carrier assembly.
    Fig 24: Removing/Installing Rear Carrier Assembly Needle Bearing
    G07013665Courtesy of NISSAN NORTH AMERICA, INC.
  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: Identifying Mid And Rear Sun Gear Assembly
    G07016123Courtesy of NISSAN NORTH AMERICA, INC.
  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
    G07016124Courtesy of NISSAN NORTH AMERICA, INC.
  29. Remove direct clutch assembly from reverse brake.
    Fig 27: Identifying Reverse Brake Direct Clutch Assembly
    G07016125Courtesy of NISSAN NORTH AMERICA, INC.
  30. Remove needle bearing from drum support.
    Fig 28: Identifying Needle Bearing And Drum Support
    G07016126Courtesy of NISSAN NORTH AMERICA, INC.
  31. Remove snap ring (1) from joint connector (A).
    Fig 29: Removing Joint Connector Snap Ring
    G07016127Courtesy of NISSAN NORTH AMERICA, INC.
  32. Push joint connector (A).
    CAUTION: Be careful not to damage connector.
    Fig 30: Pushing Joint Connector
    G07016128Courtesy of NISSAN NORTH AMERICA, INC.
  33. Remove oil pan mounting bolts (<==).
    Fig 31: Identifying Oil Pan Mounting Bolts
    G08233563Courtesy of NISSAN NORTH AMERICA, INC.
  34. Remove oil pan (2) and oil pan gasket.
  35. Remove magnets (1) from oil pan.
    Fig 32: Identifying Oil Pan Magnets
    G07013517Courtesy of NISSAN NORTH AMERICA, INC.
  36. Disconnect output speed sensor connector (A).
    CAUTION: Be careful not to damage connector.
  37. Disengage terminal clips (<==).
    Fig 33: Identifying Output Speed Sensor Connector And Clips
    G07013520Courtesy of NISSAN NORTH AMERICA, INC.
  38. Remove control valve & TCM mounting bolts and clip (1) from the control valve & TCM.
    Fig 34: Identifying Control Valve And TCM Bolts And Clips
    G08233566Courtesy of NISSAN NORTH AMERICA, INC.
    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/Installing Transmission Case Control Valve And TCM
    G07016133Courtesy of NISSAN NORTH AMERICA, INC.
  40. Remove joint connector (1) from the control valve & TCM using a flat-bladed screwdriver (A).
    Fig 36: Removing Joint Connector From Control Valve And TCM Using Flat-Bladed Screwdriver
    G07016134Courtesy of NISSAN NORTH AMERICA, INC.
  41. Disconnect TCM connector (A).
    CAUTION: Be careful not to damage connector.
    Fig 37: Identifying TCM Connector
    G07016135Courtesy of NISSAN NORTH AMERICA, INC.
  42. Remove rear extension assembly (2WD) or adapter case assembly (AWD) according to the following procedures.
    1. 2WD 
      1. Remove tightening bolts for rear extension assembly and transmission case.
        Fig 38: Identifying Rear Extension Assembly Mounting Bolts With Tightening Sequence
        G08233570Courtesy of NISSAN NORTH AMERICA, INC.
      2. Tap rear extension assembly using a soft hammer.
        CAUTION: Be careful not to damage adapter case.
        Fig 39: Tapping Rear Extension Assembly
        G07016137Courtesy of NISSAN NORTH AMERICA, INC.
      3. Remove rear extension assembly from transmission case. (With needle bearing.)
        Fig 40: Removing/Installing Transmission Case Rear Extension Assembly
        G07016138Courtesy of NISSAN NORTH AMERICA, INC.
      4. Remove bearing race from output shaft.
        Fig 41: Removing/Installing Output Shaft Bearing Race
        G07016139Courtesy of NISSAN NORTH AMERICA, INC.
      5. Remove output shaft from transmission case by rotating left/right.
        Fig 42: Rotating Left/Right Transmission Case Output Shaft
        G07016140Courtesy of NISSAN NORTH AMERICA, INC.
      6. Remove parking gear (1) from output shaft (2).
        Fig 43: Removing/Installing Output Shaft Parking Gear
        G07013535Courtesy of NISSAN NORTH AMERICA, INC.
      7. Remove seal rings (1) from output shaft.
        Fig 44: Identifying Output Shaft Seal Rings
        G07013536Courtesy of NISSAN NORTH AMERICA, INC.
    2. AWD 
      1. Remove tightening bolts for adapter case assembly and transmission case.
        Fig 45: Identifying Adapter Case Assembly, Bracket And Mounting Bolts
        G08233577Courtesy of NISSAN NORTH AMERICA, INC.
      2. Tap adapter case assembly using a soft hammer.
        CAUTION: Be careful not to damage adapter case.
        Fig 46: Tapping Adapter Case Assembly Using Soft Hammer
        G07016144Courtesy of NISSAN NORTH AMERICA, INC.
      3. Remove adapter case assembly from transmission case. (With needle bearing)
        Fig 47: Removing/Installing Transmission Adapter Case Assembly
        G07016145Courtesy of NISSAN NORTH AMERICA, INC.
      4. Remove bearing race from output shaft.
        Fig 48: Removing/Installing Output Shaft Bearing Race
        G07016139Courtesy of NISSAN NORTH AMERICA, INC.
      5. Remove output shaft from transmission case by rotating left/right.
        Fig 49: Rotating Left/Right Transmission Case Output Shaft
        G07016140Courtesy of NISSAN NORTH AMERICA, INC.
      6. Remove gasket from transmission case.
        Fig 50: Removing/Installing Transmission Case Gasket
        G07016148Courtesy of NISSAN NORTH AMERICA, INC.
      7. Remove parking gear (1) from output shaft (2).
        Fig 51: Removing/Installing Output Shaft Parking Gear
        G07013535Courtesy of NISSAN NORTH AMERICA, INC.
      8. Remove seal rings (1) from output shaft.
        Fig 52: Identifying Output Shaft Seal Rings
        G07013536Courtesy of NISSAN NORTH AMERICA, INC.
  43. Remove needle bearing from transmission case.
    Fig 53: Identifying Transmission Case Needle Bearing
    G07016151Courtesy of NISSAN NORTH AMERICA, INC.
  44. Remove output speed sensor (1) from transmission case.
    Fig 54: Identifying Output Speed Sensor Mounting Bolt
    G08233586Courtesy of NISSAN NORTH AMERICA, INC.
    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.
  46. Remove reverse brake retaining plate from transmission case.
    Fig 55: Removing Reverse Brake Snap Ring (Fixing Plate) Using Flat-Bladed Screwdrivers
    G07016153Courtesy of NISSAN NORTH AMERICA, INC.
  47. Remove N-spring from transmission case.
    Fig 56: Identifying N-Spring, Transmission Case, Driven And Drive Plates
    G07016154Courtesy of NISSAN NORTH AMERICA, INC.
  48. Remove reverse brake component part (drive plates, driven plates, dish plates and retaining plate) from transmission case.
    Fig 57: Removing Transmission Case Reverse Brake Components
    G07016155Courtesy of NISSAN NORTH AMERICA, INC.
  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 (Fixing Spring Retainer)
    G07016156Courtesy of NISSAN NORTH AMERICA, INC.
  50. Remove reverse brake spring retainer and reverse brake return spring from transmission case.
    Fig 59: Identifying Reverse Brake Spring Retainer
    G07016157Courtesy of NISSAN NORTH AMERICA, INC.
  51. Remove seal rings from drum support.
    Fig 60: Identifying Drum Support Seal Rings
    G07016158Courtesy of NISSAN NORTH AMERICA, INC.
  52. Remove needle bearing from drum support edge surface.
    Fig 61: Identifying Drum Support Needle Bearing
    G07016159Courtesy of NISSAN NORTH AMERICA, INC.
  53. Remove reverse brake piston (1) from transmission case with compressed air. Refer to "OIL CHANNEL ".
    Fig 62: Removing Transmission Case Reverse Brake Piston Using Compressed Air
    G08233594Courtesy of NISSAN NORTH AMERICA, INC.
    CAUTION: Care should be taken not to abruptly blow air. It makes pistons incline, as the result, it becomes hard to disassemble the pistons.
  54. Remove D-rings from reverse brake piston.
    Fig 63: Identifying D-Rings And Reverse Brake Piston
    G07013608Courtesy of NISSAN NORTH AMERICA, INC.
  55. Remove manual shaft retaining pin with pair of nippers.
    CAUTION: Be careful not to cut retaining pin.
    Fig 64: Removing Manual Shaft Retaining Pin Using Pair Of Nippers
    G07013609Courtesy of NISSAN NORTH AMERICA, INC.
  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, Detent Spring And Parking Rod
    G07013610Courtesy of NISSAN NORTH AMERICA, INC.
  59. Use a pin punch [4 mm (0.16 in) dia. commercial service tool] to knock out retaining pin (1).
    Fig 66: Identifying Knock Out Retaining Pin
    G07013611Courtesy of NISSAN NORTH AMERICA, INC.
  60. Remove manual plate from manual shaft.
  61. Remove manual shaft from transmission case.
    Fig 67: Removing/Installing Manual Plate (With Parking Rod)
    G07013612Courtesy of NISSAN NORTH AMERICA, INC.
    Fig 68: Removing/Installing Transmission Case Manual Shaft
    G07013613Courtesy of NISSAN NORTH AMERICA, INC.
  62. Remove manual shaft oil seals using a flat-bladed screwdriver.
    CAUTION: Be careful not to scratch transmission case.
    Fig 69: Removing Manual Shaft Oil Seals Using Flat-Bladed Screwdriver
    G07013614Courtesy of NISSAN NORTH AMERICA, INC.
  63. Remove detent spring (1) from transmission case.
    Fig 70: Identifying Detent Spring Bolt
    G08233602Courtesy of NISSAN NORTH AMERICA, INC.
  64. Remove needle bearing (1) from rear extension (2WD) or adapter case (AWD).
    Fig 71: Identifying Rear Extension Needle Bearing
    G07013537Courtesy of NISSAN NORTH AMERICA, INC.
  65. Remove parking actuator support from rear extension (2WD) or adapter case (AWD).
    Fig 72: Removing/Installing Rear Extension Parking Actuator Support
    G07013617Courtesy of NISSAN NORTH AMERICA, INC.
  66. Remove parking pawl (with return spring) and pawl shaft from rear extension (2WD) or adapter case (AWD).
    Fig 73: Removing/Installing Parking Pawl (With Return Spring)
    G07013618Courtesy of NISSAN NORTH AMERICA, INC.
  67. Remove return spring (1) from parking pawl (2).
    Fig 74: Identifying Return Spring And Parking Pawl
    G07013540Courtesy of NISSAN NORTH AMERICA, INC.
  68. Remove rear oil seal from rear extension (B) or adapter case (C) using a flat-bladed screwdriver (A).
    Fig 75: Removing Rear Oil Seal From Rear Extension Using Flat-Bladed Screwdriver
    G08233607Courtesy of NISSAN NORTH AMERICA, INC.
    CAUTION: Be careful not to scratch adapter case.