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Home >> Nissan-Datsun >> 2004 >> Sentra SE-R >> Repair and Diagnosis >> External Pages >> Different car >> Section 1511 (Manual Transmission) >> Transmission Assembly >> Disassembly and Assembly >> Disassembly >> Gear Components

Gear Components

WARNING: This page is about a different car, the 2005 Nissan Xterra. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove rear extension (or OD gear case) and transmission case. Refer to "CASE COMPONENTS ".
  2. Remove shift forks and fork rods. Refer to "SHIFT CONTROL COMPONENTS ".
  3. Before disassembling, measure the end play for each position. If the end play is outside the standards, disassemble and inspect.
    • Main drive gear

      End play: 0 - 0.10 mm (0 - 0.004 in) 

      Fig 1: Measuring End Play Of Main Drive Gear
      G03607595Courtesy of NISSAN MOTOR CO., U.S.A.
    • Mainshaft (Rear side)

      End play: 0 - 0.10 mm (0 - 0.004 in) 

      Fig 2: Measuring End Play Of Mainshaft (Rear Side)
      G03607596Courtesy of NISSAN MOTOR CO., U.S.A.
    • Counter gear

      End play: 0 - 0.10 mm (0 - 0.004 in) 

      Fig 3: Measuring End Play Of Counter Gear
      G03607597Courtesy of NISSAN MOTOR CO., U.S.A.
  4. Remove reverse idler gear according to the following.
    1. Remove reverse idler shaft assembly from adapter plate.
    2. Remove reverse idler thrust washer, reverse idler gear and reverse idler needle bearing from reverse idler shaft.
      Fig 4: Removing Reverse Idler Gear
      G03607598Courtesy of NISSAN MOTOR CO., U.S.A.
  5. Remove reverse main gear and reverse synchronizer hub assembly according to the following.
    1. Remove snap ring from mainshaft using suitable tool.
      Fig 5: Removing Snap Ring From Mainshaft
      G03607599Courtesy of NISSAN MOTOR CO., U.S.A.
    2. Remove reverse main gear and reverse synchronizer hub assembly using suitable tool.
    3. Remove reverse main needle bearing from mainshaft.
      Fig 6: Removing Reverse Main Needle Bearing
      G03607600Courtesy of NISSAN MOTOR CO., U.S.A.
  6. Remove reverse coupling sleeve according to the following.
    1. Remove snap ring from reverse synchronizer hub.
    2. Remove spread springs and shifting inserts from reverse synchronizer hub.
    3. Remove reverse coupling sleeve from reverse synchronizer hub.
      Fig 7: Removing Reverse Coupling Sleeve
      G03607601Courtesy of NISSAN MOTOR CO., U.S.A.
  7. Remove reverse counter gear according to the following.
    1. Remove snap ring from counter gear using suitable tool.
      Fig 8: Removing Snap Ring From Counter Gear
      G03607602Courtesy of NISSAN MOTOR CO., U.S.A.
    2. Remove reverse counter gear using suitable tool.
  8. Remove counter rear bearing spacer from counter gear.
    Fig 9: Removing Counter Rear Bearing Spacer
    G03607603Courtesy of NISSAN MOTOR CO., U.S.A.
  9. Remove bearing retainer bolts, and then remove bearing retainer.
    Fig 10: Removing Bearing Retainer Bolts
    G03607604Courtesy of NISSAN MOTOR CO., U.S.A.
  10. Remove main drive gear assembly, mainshaft assembly and counter gear assembly according to the following.
    1. Remove snap ring from mainshaft bearing using suitable tool.
      Fig 11: Removing Snap Ring From Mainshaft Bearing
      G03607605Courtesy of NISSAN MOTOR CO., U.S.A.
    2. Carefully tap mainshaft using suitable tool, and then remove main drive gear assembly, mainshaft assembly and counter gear assembly from adapter plate.
    3. Remove main pilot bearing, pilot bearing spacer from mainshaft.
    4. Remove 5th baulk ring from main drive gear.
      Fig 12: Removing 5Th Baulk Ring From Main Drive Gear
      G03607606Courtesy of NISSAN MOTOR CO., U.S.A.
  11. Remove counter rear bearing from adapter plate.
    Fig 13: Removing Counter Rear Bearing
    G03607607Courtesy of NISSAN MOTOR CO., U.S.A.
  12. Remove magnet from adapter plate.
    Fig 14: Removing Magnet From Adapter Plate
    G03607608Courtesy of NISSAN MOTOR CO., U.S.A.
  13. Remove baffle plate bolt, and then remove baffle plate from adapter plate.
    Fig 15: Removing Baffle Plate Bolt
    G03607609Courtesy of NISSAN MOTOR CO., U.S.A.
  14. Remove breather from adapter plate.
    Fig 16: Removing Breather From Adapter Plate
    G03607610Courtesy of NISSAN MOTOR CO., U.S.A.
  15. Remove main drive gear bearing according to the following.
    1. Remove snap ring from main drive gear using suitable tool.
      Fig 17: Removing Snap Ring From Main Drive Gear
      G03607611Courtesy of NISSAN MOTOR CO., U.S.A.
    2. Press out main drive gear bearing using suitable tool.
      Fig 18: Removing Main Drive Gear Bearing
      G03607612Courtesy of NISSAN MOTOR CO., U.S.A.
  16. Before disassembling, measure the end play for mainshaft (Front side). If the end play is outside the standards, disassemble and inspect.

    End play: 0 - 0.10 mm (0 - 0.004 in) 

    Fig 19: Measuring End Play For Mainshaft
    G03607613Courtesy of NISSAN MOTOR CO., U.S.A.
  17. Press out reverse main gear bushing, mainshaft bearing and 4th main gear using suitable tool.
  18. Remove 3rd-4th main spacer from mainshaft.
    Fig 20: Removing Reverse Main Gear Bushing
    G03607614Courtesy of NISSAN MOTOR CO., U.S.A.
  19. Remove 3rd main gear and 1st main gear according to the following.
    1. Press out 3rd main gear and 1st main gear using suitable tool.
      CAUTION: Be careful not to damage 1st outer baulk ring.
    2. Remove 1st needle bearing from mainshaft.
      Fig 21: Removing 1St Needle Bearing From Mainshaft
      G03607615Courtesy of NISSAN MOTOR CO., U.S.A.
  20. Remove 1st-2nd synchronizer hub assembly and 2nd main gear according to the following.
    1. Press out 1st gear bushing, 1st-2nd synchronizer hub assembly and 2nd main gear using suitable tool.
      CAUTION: Be aware that when using the press, if mainshaft gear positioner catches on the V-block, etc., mainshaft could be damaged.
    2. Remove 2nd needle bearing from mainshaft.
  21. Remove 1st-2nd coupling sleeve according to the following.
    1. Remove spread springs and shifting inserts from 1st-2nd synchronizer hub.
    2. Remove 1st-2nd coupling sleeve from 1st-2nd synchronizer hub.
      Fig 22: Removing 1St Gear Bushing
      G03607616Courtesy of NISSAN MOTOR CO., U.S.A.
  22. Remove 6th main gear and 5th-6th synchronizer hub assembly according to the following.
    1. Remove snap ring from mainshaft using suitable tool.
      Fig 23: Removing Snap Ring From Mainshaft
      G03607617Courtesy of NISSAN MOTOR CO., U.S.A.
    2. Press out 6th main gear and 5th-6th synchronizer hub assembly using suitable tool.
    3. Remove 6th needle bearing from mainshaft.
  23. Remove 5th-6th coupling sleeve according to the following.
    1. Remove spread springs and shifting inserts from 5th-6th synchronizer hub.
    2. Remove 5th-6th coupling sleeve from 5th-6th synchronizer hub.
      Fig 24: Removing 6Th Main Gear And 5Th-6Th Synchronizer Hub Assembly
      G03607618Courtesy of NISSAN MOTOR CO., U.S.A.
  24. Remove 3rd counter gear, 3rd-4th synchronizer hub assembly, 4th counter gear according to the following.
    1. Press out 3rd counter gear, 3rd-4th synchronizer hub assembly, 4th counter gear, 4th needle bearing, 4th gear bushing, 4th counter gear thrust washer, and counter rear bearing inner race using suitable tool.
    2. Remove 3rd needle bearing from counter gear.
  25. Remove 3rd-4th coupling sleeve according to the following.
    1. Remove spread springs and shifting inserts from 3rd-4th synchronizer hub.
    2. Remove 3rd-4th coupling sleeve from 3rd-4th synchronizer hub.
      Fig 25: Removing 3Rd Needle Bearing
      G03607619Courtesy of NISSAN MOTOR CO., U.S.A.
  26. Press out 3rd gear bushing using suitable tool.
    CAUTION: Do not use oil hole of 3rd gear bushing when press out.
    Fig 26: Removing 3Rd Gear Bushing
    G03607620Courtesy of NISSAN MOTOR CO., U.S.A.
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