2004 Nissan-Datsun Sentra SE-RFACTORY OEM SERVICE PROCEDURE

Automatic Transaxle - Re4F04B: Disassembly: Disassembly

  1. Drain ATF through drain plug.
  2. Remove torque converter.
    Fig 1: Removing Torque Converter
    G00901913Courtesy of NISSAN MOTOR CO., U.S.A.
  3. Check torque converter one-way clutch using check tool.
    1. Insert check tool into the groove of bearing support built into one-way clutch outer race.
    2. When fixing bearing support with check tool, rotate one- way clutch spline using screwdriver.
    3. Check that inner race rotates clockwise only. If not, replace torque converter assembly.
    Fig 2: Checking Torque Converter One-Way Clutch
    G00901914Courtesy of NISSAN MOTOR CO., U.S.A.
  4. Remove A/T fluid charging pipe and fluid cooler tube.
    Fig 3: Removing A/T Fluid Charging Pipe And Oil Cooler Tube
    G00901915Courtesy of NISSAN MOTOR CO., U.S.A.
  5. Set manual shaft to position P.
  6. Remove park/neutral position (PNP) switch.
    Fig 4: Removing PNP Switch
    G00901916Courtesy of NISSAN MOTOR CO., U.S.A.
  7. Remove oil pan and oil pan gasket.
    • Always replace oil pan bolts as they are self-sealing bolts. 
  8. Check foreign materials in oil pan to help determine causes of malfunction. If the fluid is very dark, smells burned, or contains foreign particles, the frictional material (clutches, band) may need replacement. A tacky film that will not wipe clean indicates varnish build up. Varnish can cause valves, servo, and clutches to stick and can inhibit pump pressure.
    • If frictional material is detected, replace radiator after repair of A/T.  Refer to RADIATOR .
    Fig 5: Checking Foreign Material In Oil Pan
    G00901917Courtesy of NISSAN MOTOR CO., U.S.A.
  9. Remove control valve assembly according to the following procedures.
    1. Remove control valve assembly mounting bolts I, X  and bullet.
    2. Remove snap ring from terminal cord assembly connector.
      Fig 6: Removing Control Valve Assembly Mounting Bolts
      G00901918Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Push terminal body into transmission case and draw out solenoid harness.
    Fig 7: Pushing Terminal Body Into Transmission Case
    G00901919Courtesy of NISSAN MOTOR CO., U.S.A.
  10. Remove manual valve from control valve assembly.
    Fig 8: Removing Manual Valve From Control Valve Assembly
    G00901920Courtesy of NISSAN MOTOR CO., U.S.A.
  11. Remove return spring from servo release accumulator piston.
    Fig 9: Removing Return Spring From Servo Release Accumulator Piston
    G00901921Courtesy of NISSAN MOTOR CO., U.S.A.
  12. Remove servo release accumulator piston with compressed air.
    Fig 10: Removing Servo Release Accumulator Piston
    G00901922Courtesy of NISSAN MOTOR CO., U.S.A.
  13. Remove O-rings from servo release accumulator piston.
  14. Remove N-D accumulator piston and return spring with compressed air.
    Fig 11: Removing N-D Accumulator Piston And Return Spring
    G00901923Courtesy of NISSAN MOTOR CO., U.S.A.
  15. Remove O-rings from N-D accumulator piston.
  16. Check accumulator pistons and contact surface of transmission case for damage.
    Fig 12: Checking Accumulator Return Springs For Damage And Free Length
    G00901924Courtesy of NISSAN MOTOR CO., U.S.A.
  17. Check accumulator return springs for damage and free length.
  18. Remove lip seals.
    Fig 13: Removing Lip Seals From Band Servo Oil Port
    G00901925Courtesy of NISSAN MOTOR CO., U.S.A.
  19. Remove L & R oil tube and oil sleeve.
    Fig 14: Removing L & R Oil Tube And Oil Sleeve
    G00901926Courtesy of NISSAN MOTOR CO., U.S.A.
  20. Remove converter housing according to the following procedures.
    1. Remove converter housing mounting bolts.
    2. Remove converter housing by tapping it lightly.
      Fig 15: Removing Converter Housing Mounting Bolts
      G00901927Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Remove O-ring from differential oil port.
    Fig 16: Removing O-Ring From Differential Oil Port
    G00901928Courtesy of NISSAN MOTOR CO., U.S.A.
  21. Remove final drive assembly from transmission case.
    Fig 17: Removing Final Drive Assembly From Transmission Case
    G00901929Courtesy of NISSAN MOTOR CO., U.S.A.
  22. Remove differential side bearing outer race and side bearing adjusting shim from transmission case.
    Fig 18: Removing Differential Side Bearing Outer Race From Transmission
    G00901930Courtesy of NISSAN MOTOR CO., U.S.A.
  23. Remove differential side bearing adjusting shim from transmission case.
    Fig 19: Removing Differential Side Bearing Adjusting Shim From Transmission Case
    G00901931Courtesy of NISSAN MOTOR CO., U.S.A.
  24. Remove differential side bearing outer race from converter housing.
    Fig 20: Removing Differential Side Bearing Outer Race From Converter Housing
    G00901932Courtesy of NISSAN MOTOR CO., U.S.A.
  25. Remove oil seal with screwdriver from converter housing.
    • Be careful not to damage case. 
    Fig 21: Removing Oil Seal From Converter Housing
    G00901933Courtesy of NISSAN MOTOR CO., U.S.A.
  26. Remove differential lubricant tube from converter housing.
    Fig 22: Removing Differential Lubricant Tube From Converter Housing
    G00901934Courtesy of NISSAN MOTOR CO., U.S.A.
  27. Remove oil pump according to the following procedures.
    1. Remove O-ring from input shaft.
      Fig 23: Removing O-Ring From Input Shaft
      G00901935Courtesy of NISSAN MOTOR CO., U.S.A.
    2. Remove oil pump assembly, baffle plate and gasket from transmission case.
      Fig 24: Removing Oil Pump Assembly, Baffle Plate And Gasket From Transmission Case
      G00901936Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Remove thrust washer and bearing race from oil pump assembly.
    Fig 25: Removing Thrust Washer And Bearing Race From Oil Pump Assembly
    G00901937Courtesy of NISSAN MOTOR CO., U.S.A.
  28. Remove brake band according to the following procedures.
    1. Loosen lock nut, then back off anchor end pin.
      • Do not reuse anchor end pin. 
      Fig 26: Removing Anchor End Pin
      G00901938Courtesy of NISSAN MOTOR CO., U.S.A.
    2. Remove brake band and strut from transmission case.
      Fig 27: Removing Brake Band From Transmission Case
      G00901939Courtesy of NISSAN MOTOR CO., U.S.A.
      • To prevent brake linings from cracking or peeling, do not stretch the flexible band unnecessarily. When removing the brake band, always secure it with a clip as shown. 

        Leave the clip in position after removing the brake band. 

      Fig 28: Securing Brake Band With Clip
      G00901940Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Check brake band facing for damage, cracks, wear or burns.
    Fig 29: Checking Brake Band Facing For Damage, Cracks, Wear Or Burns
    G00901941Courtesy of NISSAN MOTOR CO., U.S.A.
  29. Remove input shaft assembly (high clutch) and reverse clutch according to the following procedures.
    1. Remove input shaft assembly (high clutch) with reverse clutch.
      Fig 30: Removing Input Shaft Assembly (High Clutch) And Reverse Clutch
      G00901942Courtesy of NISSAN MOTOR CO., U.S.A.
    2. Remove input shaft assembly (high clutch) from reverse clutch.
      Fig 31: Removing Input Shaft Assembly (High Clutch) From Reverse Clutch
      G00901943Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Remove needle bearings from high clutch drum and check for damage or wear.
      Fig 32: Removing Needle Bearing From High Clutch Drum
      G00901944Courtesy of NISSAN MOTOR CO., U.S.A.
    4. Remove high clutch hub and front sun gear from transmission case.
      Fig 33: Removing High Clutch Hub And Needle Bearing From Transmission Case
      G00901945Courtesy of NISSAN MOTOR CO., U.S.A.
    5. Remove front sun gear and needle bearing from high clutch hub and check for damage or wear.
    6. Remove bearing race from front sun gear and check for damage or wear.
    Fig 34: Removing Front Sun Gear And Needle Bearings From Transmission Case
    G00901946Courtesy of NISSAN MOTOR CO., U.S.A.
  30. Remove needle bearing from transmission case and check for damage or wear.
    Fig 35: Removing Needle Bearing From Transmission Case
    G00901947Courtesy of NISSAN MOTOR CO., U.S.A.
  31. Apply compressed air and check to see that low and reverse brake operates.
    Fig 36: Checking Operation Of Low And Reverse Brake Operation
    G00901948Courtesy of NISSAN MOTOR CO., U.S.A.
  32. Remove low one-way clutch and front planetary carrier assembly according to the following procedures.
    1. Remove snap ring with flat-bladed screwdriver.
      Fig 37: Removing Snap Ring
      G00901949Courtesy of NISSAN MOTOR CO., U.S.A.
    2. Remove low one-way clutch with a hook made of wire.
      Fig 38: Removing Low One-Way Clutch
      G00901950Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Remove snap ring with flat-bladed screwdriver.
      Fig 39: Removing Snap Ring
      G00901951Courtesy of NISSAN MOTOR CO., U.S.A.
    4. Remove front planetary carrier with low and reverse brake piston and retainer.
      Fig 40: Removing Front Planetary Carrier With Low And Reverse Brake Piston And Retainer
      G00901952Courtesy of NISSAN MOTOR CO., U.S.A.
    5. Remove low and reverse brake spring retainer.
      • Do not remove return springs from spring retainer. 
      Fig 41: Removing Low And Reverse Brake Spring Retainer
      G00901953Courtesy of NISSAN MOTOR CO., U.S.A.
    6. Check that low one-way clutch rotates in the direction of the arrow and locks in the opposite direction.
      Fig 42: Checking Low One-Way Clutch
      G00901954Courtesy of NISSAN MOTOR CO., U.S.A.
    7. Remove needle bearing, low and reverse brake piston and retainer from front planetary carrier.
    8. Check front planetary carrier, low one-way clutch and needle bearing for damage or wear.
      Fig 43: Removing Needle Bearing, Low And Reverse Brake Piston And Retainer From Front Planetary Carrier
      G00901955Courtesy of NISSAN MOTOR CO., U.S.A.
    9. Check clearance between planetary gears and planetary carrier with feeler gauge.
      1. Standard clearance: 0.20 - 0.70 mm (0.0079 - 0.0276 in) 
      2. Allowable limit: 0.80 mm (0.0315 in) 

      Replace front planetary carrier if the clearance exceeds allowable limit.

    Fig 44: Checking Clearance Between Planetary Gears And Planetary Carrier
    G00901956Courtesy of NISSAN MOTOR CO., U.S.A.
  33. Remove rear planetary carrier assembly and rear sun gear according to the following procedures.
    1. Remove rear planetary carrier assembly from transmission case.
      Fig 45: Removing Rear Planetary Carrier Assembly From Transmission Case
      G00901957Courtesy of NISSAN MOTOR CO., U.S.A.
    2. Remove rear sun gear from rear planetary carrier.
      Fig 46: Removing Rear Sun Gear From Rear Planetary Carrier
      G00901958Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Remove needle bearings from rear planetary carrier assembly.
      Fig 47: Removing Needle Bearings From Rear Planetary Carrier Assembly
      G00901959Courtesy of NISSAN MOTOR CO., U.S.A.
    4. Check rear planetary carrier, rear sun gear and needle bearings for damage or wear.
    5. Check clearance between pinion washer and rear planetary carrier with feeler gauge.
      1. Standard clearance: 0.20 - 0.70 mm (0.0079 - 0.0276 in) 
      2. Allowable limit: 0.80 mm (0.0315 in) 

      Replace rear planetary carrier if the clearance exceeds allowable limit.

    Fig 48: Checking Clearance Between Pinion Washer And Rear Planetary Carrier
    G00901960Courtesy of NISSAN MOTOR CO., U.S.A.
  34. Remove rear internal gear and forward clutch hub from transmission case.
    Fig 49: Removing Rear Internal Gear And Forward Clutch Hub From Transmission Case
    G00901961Courtesy of NISSAN MOTOR CO., U.S.A.
  35. Remove overrun clutch hub from transmission case.
    Fig 50: Removing Overrun Clutch Hub From Transmission Case
    G00901962Courtesy of NISSAN MOTOR CO., U.S.A.
  36. Remove needle bearing from overrun clutch hub and check for damage or wear.
    Fig 51: Removing Needle Bearing From Overrun Clutch Hub
    G00901963Courtesy of NISSAN MOTOR CO., U.S.A.
  37. Remove forward clutch assembly from transmission case.
    Fig 52: Removing Forward Clutch Assembly From Transmission Case
    G00901964Courtesy of NISSAN MOTOR CO., U.S.A.
  38. Remove needle bearing from transmission case.
    Fig 53: Removing Needle Bearing From Transmission Case
    G00901965Courtesy of NISSAN MOTOR CO., U.S.A.
  39. Remove output shaft assembly according to the following procedures.
    1. Remove side cover bolts.
      • Do not mix bolts A and B. 
      • Always replace bolts A as they are self-sealing bolts. 
      Fig 54: Removing Output Shaft Assembly Side Cover Bolts
      G00901966Courtesy of NISSAN MOTOR CO., U.S.A.
    2. Remove side cover by lightly tapping it with a soft hammer.
      • Be careful not to drop output shaft assembly. It might come out when removing side cover. 
      Fig 55: Removing Side Cover
      G00901967Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Remove adjusting shim.
      Fig 56: Removing Adjusting Shim
      G00901968Courtesy of NISSAN MOTOR CO., U.S.A.
    4. Remove output shaft assembly.
      Fig 57: Removing Output Shaft Assembly
      G00901969Courtesy of NISSAN MOTOR CO., U.S.A.
      • If output shaft assembly came off with side cover, tap cover with a soft hammer to separate.
      Fig 58: Separating Output Shaft Assembly From Side Cover
      G00901970Courtesy of NISSAN MOTOR CO., U.S.A.
    5. Remove needle bearing.
    Fig 59: Removing Needle Bearing
    G00901971Courtesy of NISSAN MOTOR CO., U.S.A.
  40. Disassemble reduction pinion gear according to the following procedures.
    1. Set manual shaft to position P to fix idler gear.
    2. Unlock idler gear lock nut using a pin punch.
      Fig 60: Unlocking Idler Gear Lock Nut Using A Pin Punch
      G00901972Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Remove idler gear lock nut.
      • Do not reuse idler gear lock nut. 
      Fig 61: Removing Idler Gear Lock Nut
      G00901973Courtesy of NISSAN MOTOR CO., U.S.A.
    4. Remove idler gear with puller.
      Fig 62: Removing Idler Gear
      G00901974Courtesy of NISSAN MOTOR CO., U.S.A.
    5. Remove reduction pinion gear.
    6. Remove adjusting shim from reduction pinion gear.
    Fig 63: Removing Adjusting Shim From Reduction Pinion Gear
    G00901975Courtesy of NISSAN MOTOR CO., U.S.A.
  41. Remove return spring from parking shaft with screwdriver.
  42. Draw out parking shaft and remove parking pawl from transmission case.
  43. Check parking pawl and shaft for damage or wear.
    Fig 64: Removing Parking Pawl From Transmission Case
    G00901976Courtesy of NISSAN MOTOR CO., U.S.A.
  44. Remove parking actuator support from transmission case.
  45. Check parking actuator support for damage or wear.
    Fig 65: Removing Parking Actuator Support
    G00901977Courtesy of NISSAN MOTOR CO., U.S.A.
  46. Remove side oil seal with screwdriver from transmission case.
    Fig 66: Removing Side Oil Seal
    G00901978Courtesy of NISSAN MOTOR CO., U.S.A.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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