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Home >> Nissan-Datsun >> 2003 >> Sentra SE-R, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 1713 (Transfer Case) >> ATX14B >> Transfer Assembly >> Disassembly and Assembly >> Disassembly >> Center Case
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Center Case

WARNING: This page is about a different car, the 2006 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the rear case assembly. Refer to , "REAR CASE ".
  2. Remove the front case assembly. Refer to , "FRONT CASE ".
  3. Hold the front drive shaft with one hand and tap to remove the front drive shaft with the drive chain.
    CAUTION: Do not tap drive chain.
    Fig 1: Removing Front Drive Shaft With Drive Chain
    G04174631Courtesy of NISSAN MOTOR CO., U.S.A.
  4. Remove the front drive shaft front bearing using Tools.

    Tool number A: ST33052000 ( - ) 

    B: ST30031000 ( - ) 

    Fig 2: Removing Front Drive Shaft Front Bearing Using Tools
    G04174632Courtesy of NISSAN MOTOR CO., U.S.A.
  5. Remove the front drive shaft rear bearing using Tools.

    Tool number A: ST33052000 ( - ) 

    B: ST30031000 ( - ) 

    Fig 3: Removing Front Drive Shaft Rear Bearing Using Tools
    G04174633Courtesy of NISSAN MOTOR CO., U.S.A.
  6. Remove the neutral-4LO and ATP switches.
    Fig 4: Removing Neutral-4LO And ATP Switches
    G04174634Courtesy of NISSAN MOTOR CO., U.S.A.
  7. Remove the bolts and main oil pump cover.
    Fig 5: Removing Main Oil Pump Cover
    G04174635Courtesy of NISSAN MOTOR CO., U.S.A.
  8. Remove the outer gear, inner gear and main oil pump housing from the center case.
    Fig 6: Removing Outer Gear, Inner Gear And Main Oil Pump Housing From Center Case
    G04174636Courtesy of NISSAN MOTOR CO., U.S.A.
  9. Remove the seal ring from the main oil pump cover.
    Fig 7: Identifying Seal Ring And Main Oil Pump Cover
    G04174637Courtesy of NISSAN MOTOR CO., U.S.A.
  10. Remove the stem bleeder from the bleed hole.
    Fig 8: Identifying Stem Bleeder And Bleed Hole
    G04174638Courtesy of NISSAN MOTOR CO., U.S.A.
  11. Remove the snap ring and washer holder from the mainshaft.
    Fig 9: Identifying Snap Ring And Washer Holder
    G04174639Courtesy of NISSAN MOTOR CO., U.S.A.
  12. Remove the C-rings from the mainshaft using suitable tool.
    Fig 10: Removing C-Rings From Mainshaft Using Suitable Tool
    G04174640Courtesy of NISSAN MOTOR CO., U.S.A.
  13. Set the center case on the press stand. Remove the mainshaft from the center case.
    Fig 11: Removing Mainshaft From Center Case
    G04174641Courtesy of NISSAN MOTOR CO., U.S.A.
  14. Remove the snap ring from the mainshaft using suitable tool.
    Fig 12: Removing Snap Ring From Mainshaft Using Suitable Tool
    G04174642Courtesy of NISSAN MOTOR CO., U.S.A.
  15. Remove the thrust needle bearing from the press flange.
    Fig 13: Removing Thrust Needle Bearing
    G04174643Courtesy of NISSAN MOTOR CO., U.S.A.
  16. Press the press flange until the snap ring is out of place using Tools.

    Tool number A: ST22452000 (J-34335) 

    B: ST30911000 ( - ) 

    C: KV31103300 ( - ) 

    Fig 14: Pressing Press Flange
    G04174644Courtesy of NISSAN MOTOR CO., U.S.A.
  17. Remove the snap ring from the mainshaft using suitable tool.
    Fig 15: Removing Snap Ring From Mainshaft Using Tool
    G04174645Courtesy of NISSAN MOTOR CO., U.S.A.
  18. Remove the press flange from the mainshaft.
    Fig 16: Removing Press Flange From Mainshaft
    G04174646Courtesy of NISSAN MOTOR CO., U.S.A.
  19. Remove the return spring assembly from the clutch hub.
    Fig 17: Removing Return Spring Assembly
    G04174647Courtesy of NISSAN MOTOR CO., U.S.A.
  20. Remove each plate from the clutch drum.
    Fig 18: Removing Plate From Clutch Drum
    G04174648Courtesy of NISSAN MOTOR CO., U.S.A.
  21. Remove the snap ring from the mainshaft.
    Fig 19: Removing Snap Ring From Mainshaft
    G04174649Courtesy of NISSAN MOTOR CO., U.S.A.
  22. Remove the mainshaft from the clutch drum and clutch hub using suitable tool.
    Fig 20: Removing Mainshaft From Clutch Drum And Clutch Hub Using Suitable Tool
    G04174650Courtesy of NISSAN MOTOR CO., U.S.A.
  23. Remove the needle bearing and spacer from the mainshaft.
  24. Remove the snap ring from the clutch hub using suitable tool.
    Fig 21: Removing Snap Ring From Clutch Hub
    G04174651Courtesy of NISSAN MOTOR CO., U.S.A.
  25. Remove the oil pressure check plug from the oil pressure check port.
    Fig 22: Removing Oil Pressure Check Plug From Oil Pressure Check Port
    G04174652Courtesy of NISSAN MOTOR CO., U.S.A.
  26. Apply air gradually from the oil pressure check port, and remove the clutch piston assembly from the center case.
    Fig 23: Removing Clutch Piston Assembly From Center Case
    G04174653Courtesy of NISSAN MOTOR CO., U.S.A.
  27. Remove the thrust needle bearing race from the clutch piston by hooking a edge into 3 notches of the thrust needle bearing race using suitable tool.
    CAUTION: Do not damage clutch piston or thrust needle bearing race.
    Fig 24: Removing Thrust Needle Bearing Race From Clutch Piston
    G04174654Courtesy of NISSAN MOTOR CO., U.S.A.
  28. Remove the two D-rings from the clutch piston.
    Fig 25: Identifying D-Rings And Clutch Piston
    G04174655Courtesy of NISSAN MOTOR CO., U.S.A.
  29. Remove the mainshaft rear bearing from the center case using Tool.

    Tool number: KV38100300 (J-25523) 

    Fig 26: Removing Mainshaft Rear Bearing From Center Case Using Tool
    G04174656Courtesy of NISSAN MOTOR CO., U.S.A.
  30. Remove the two bolts and oil strainer.
    Fig 27: Identifying Oil Strainer
    G04174657Courtesy of NISSAN MOTOR CO., U.S.A.
  31. Remove the two O-rings from the oil strainer.
    Fig 28: Removing O-Rings From Oil Strainer
    G04174658Courtesy of NISSAN MOTOR CO., U.S.A.
  32. Remove the snap ring. Then push the connector assembly into the center case to remove the control valve assembly.
    Fig 29: Identifying Snap Ring
    G04174659Courtesy of NISSAN MOTOR CO., U.S.A.
  33. Remove the control valve assembly bolts.
  34. Remove the control valve assembly.
    CAUTION:
    • Do not reuse any part that has been dropped or damaged.
    • Make sure valve is assembled in the proper direction.
    • Do not use a magnet because residual magnetism stays during disassembly.
    Fig 30: Identifying Control Valve Assembly
    G04174660Courtesy of NISSAN MOTOR CO., U.S.A.
  35. Remove the lip seals from the center case.
    CAUTION: There are two kinds of lip seals (lip seal of large inner diameter: 5 pieces, lip seal of small inner diameter: 2 pieces). Confirm the position before disassembly.
    Fig 31: Identifying Lip Seals And Center Case
    G04174661Courtesy of NISSAN MOTOR CO., U.S.A.
  36. Disassemble the control valve assembly with the following procedure.
    CAUTION:
    • Do not reuse any part that has been dropped or damaged.
    • Make sure valve is assembled in the proper direction.
    • Do not use a magnet because residual magnetism stays during disassembly.
    1. Remove all the bolts except for the two shown.
      Fig 32: Identifying Control Valve Assembly
      G04174662Courtesy of NISSAN MOTOR CO., U.S.A.
    2. Remove the following from the control valve assembly:
      • Clutch pressure solenoid valve
      • Clutch pressure switch
      • 2-4WD shift solenoid valve
      • Line pressure switch
      • Transfer fluid temperature sensor
    3. Remove the O-rings from each solenoid valve, switch and terminal body.
      Fig 33: Identifying Clutch Pressure Solenoid Valve, 2-4WD Shift Solenoid Valve, Clutch Pressure Switch And Line Pressure Switch
      G04174663Courtesy of NISSAN MOTOR CO., U.S.A.
    4. Place the control valve with the lower body facing up. Remove the two bolts, and then remove the lower body and separator plate from the upper body.
      CAUTION: Do not drop relief balls. Detach lower body carefully.
      Fig 34: Identifying Lower Body And Separator Plate
      G04174664Courtesy of NISSAN MOTOR CO., U.S.A.
    5. Make sure the reverse balls, relief balls, relief springs, accumulator pistons and valve springs are securely installed as shown, and remove them.
      Fig 35: Identifying Reverse Balls, Relief Balls, Relief Springs, Accumulator Pistons And Valve Springs
      G04174665Courtesy of NISSAN MOTOR CO., U.S.A.
    6. Remove the retainer plates.
      Fig 36: Identifying Retainer Plates
      G04174666Courtesy of NISSAN MOTOR CO., U.S.A.
    7. Remove each retainer plate (1), plug (2), control valve (3) and spring (4) from the upper body (5).
      Fig 37: Identifying Upper Body, Control Valves And Springs
      G04174667Courtesy of NISSAN MOTOR CO., U.S.A.
  37. Remove the transfer motor bolts and motor from the center case. Then remove the O-ring from the transfer motor.
    Fig 38: Identifying Transfer Motor Bolts
    G04174668Courtesy of NISSAN MOTOR CO., U.S.A.
  38. Remove the sub oil pump cover bolts.
    Fig 39: Identifying Sub Oil Pump Cover Bolts
    G04174669Courtesy of NISSAN MOTOR CO., U.S.A.
  39. Thread two bolts (M4 x 0.8) into the holes of sub oil pump cover as shown, and pull out to remove the sub oil pump assembly.
    Fig 40: Identifying Bolts In Sub Oil Pump Assembly
    G04174670Courtesy of NISSAN MOTOR CO., U.S.A.
  40. Remove the outer gear and inner gear from the sub oil pump housing.
    Fig 41: Removing Outer Gear And Inner Gear From Sub Oil Pump Housing
    G04174671Courtesy of NISSAN MOTOR CO., U.S.A.
  41. Remove the oil filter bolts and oil filter.
    CAUTION:
    • Do not damage center case and oil filter.
    • Loosen bolts and detach oil filter evenly.
    Fig 42: Identifying Oil Filter
    G04174672Courtesy of NISSAN MOTOR CO., U.S.A.
  42. Remove the O-rings (1) from the oil filter (2).
    Fig 43: Identifying O-Rings And Oil Filter
    G04174673Courtesy of NISSAN MOTOR CO., U.S.A.
  43. Remove the oil filter stud from the oil filter.
  44. Remove the O-ring from the oil filter stud.
    Fig 44: Identifying Oil Filter Stud And Oil Filter
    G04174674Courtesy of NISSAN MOTOR CO., U.S.A.
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