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Home >> Infiniti >> 2014 >> QX50 Base, AWD >> Repair and Diagnosis >> Drivelines & Axles >> Differentials & Drive Axles >> Front Final Drive >> Unit Disassembly And Assembly >> Differential Assembly >> Assembly

Differential Assembly: Assembly

  1. Install side gear thrust washers with the same thickness as the ones installed prior to disassembly or reinstall the old ones on the side gears.
    Fig 1: Installing Side Gear Thrust Washers
    G07016678Courtesy of NISSAN NORTH AMERICA, INC.
  2. Install side gears and thrust washers into differential case.
    CAUTION:
    • Never reuse circular clip.
    • Make sure that the circular clip is installed to side gear (side retainer side).
  3. Align 2 pinion mate gears in diagonally opposite positions, then rotate and install them into differential case after installing thrust washer to pinion mate gear.
    Fig 2: Rotating Pinion Mate Gears Into Differential Case
    G07016679Courtesy of NISSAN NORTH AMERICA, INC.
  4. Align the lock pin holes on differential case with shaft, and install pinion mate shaft.
    Fig 3: Installing Pinion Mate Shaft
    G07016680Courtesy of NISSAN NORTH AMERICA, INC.
  5. Measure side gear end play. If necessary, select the appropriate side gear thrust washers.
    1. Place differential case straight up so that side gear to be measured comes upward.
      Fig 4: Identifying Side Gear End Play Measuring Points And Differential Center Line
      G07016681Courtesy of NISSAN NORTH AMERICA, INC.
    2. Using feeler gauge, measure the clearance between side gear back and differential case at 3 different points, while rotating side gear. Average the 3 readings, and then measure the clearance of the other side as well.

      Side gear back clearance: Refer to  "DIFFERENTIAL SIDE GEAR CLEARANCE ".

      Fig 5: Measuring Side Gear Back Clearance Using Feeler Gauge
      G07016682Courtesy of NISSAN NORTH AMERICA, INC.
      CAUTION: To prevent side gear from tilting, insert feeler gauges with the same thickness from both sides.
    3. If the back clearance is outside the specification, use a thicker/thinner side gear thrust washer to adjust. For selecting thrust washer, refer to the latest parts information.

      When the back clearance is large: Use a thicker thrust washer. 

      When the back clearance is small: Use a thinner thrust washer. 

      Fig 6: Driving Lock Pin Into Pinion Mate Shaft Using Punch
      G07016683Courtesy of NISSAN NORTH AMERICA, INC.
      CAUTION: Select a side gear thrust washer for right and left individually.
  6. Drive a lock pin into pinion mate shaft, using a punch.

    Make sure lock pin is flush with differential case.

    CAUTION: Never reuse lock pin.
  7. Align the matching mark of drive gear with the mark of differential case, then place drive gear.
    Fig 7: Identifying Matching Mark Of Drive Gear With Mark Of Differential Case
    G07016684Courtesy of NISSAN NORTH AMERICA, INC.
  8. Apply thread locking sealant into the thread hole of drive gear.
    • Use Genuine Medium Strength Thread Locking Sealant or equivalent. Refer to  "RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS ".
      Fig 8: Identifying Drive Gear Thread Hole Sealant Applying Area
      G07016685Courtesy of NISSAN NORTH AMERICA, INC.
    CAUTION: Drive gear back and threaded holes must be cleaned and degreased sufficiently.
  9. Install drive gear on the mounting bolts.
    CAUTION: Tighten bolts in a crisscross fashion.
    Fig 9: Tightening Drive Gear Mounting Bolts
    G07016686Courtesy of NISSAN NORTH AMERICA, INC.
  10. Press side bearing inner races to differential case, using the drift (A) and the base (B).
    Fig 10: Pressing Side Bearing Inner Races To Differential Case Using Drift And Base
    G09175925Courtesy of NISSAN NORTH AMERICA, INC.
    CAUTION: Never reuse side bearing inner race.
  11. Press-fit side bearing outer race into side retainer with the drift bar (A) and the drift (B).
    Fig 11: Pressing-Fit Side Bearing Outer Race Into Side Retainer Using Drift Bar And Drift
    G09175926Courtesy of NISSAN NORTH AMERICA, INC.
    CAUTION:
    • At first, using a hammer, tap bearing outer race until it becomes flat to side retainer.
    • Never reuse side bearing outer race.
  12. Press-fit side bearing outer race into gear carrier with the drift bar (A) and the drift (B).
    Fig 12: Pressing-Fit Side Bearing Outer Race Into Gear Carrier Using Drift Bar And Drift
    G09175927Courtesy of NISSAN NORTH AMERICA, INC.
    CAUTION:
    • At first, using a hammer, tap bearing outer race until it becomes flat to gear carrier.
    • Never reuse side bearing outer race.
  13. Place the differential case assembly into gear carrier.
  14. Measure side bearing preload. If necessary, select the appropriate side bearing adjusting shim. Refer to "ADJUSTMENT ".
    Fig 13: Identifying Differential Case Assembly
    G07016669Courtesy of NISSAN NORTH AMERICA, INC.
  15. Install selected side bearing adjusting shim (1). Refer to "ADJUSTMENT ".
  16. Apply multi-purpose grease to O-ring, and install it to side retainer.
    CAUTION: Never reuse O-ring.
    Fig 14: Installing Selected Side Bearing Adjusting Shim And O-Ring
    G09175929Courtesy of NISSAN NORTH AMERICA, INC.
  17. Install side retainer assembly to gear carrier.
  18. Install side retainer mounting bolts.
    Fig 15: Locating Side Retainer Mounting Bolts
    G07016692Courtesy of NISSAN NORTH AMERICA, INC.
  19. Using the drift (A) [SST: ST33400001 (J-26082)], press-fit side oil seal so that its surface comes face-to-face with the end surface of the side retainer.
    CAUTION:
    • Never reuse oil seal.
    • When installing, never incline oil seal.
    • Apply multi-purpose grease onto oil seal lips, and gear oil onto the circumference of oil seal.
    Fig 16: Installing Side Oil Seal Using Drift
    G07016652Courtesy of NISSAN NORTH AMERICA, INC.
  20. Using the drift (A) [SST: KV38102100 (J-25803-01)], press-fit side oil seal so that its surface comes face-to-face with the end surface of gear carrier.
    CAUTION:
    • Never reuse oil seal.
    • When installing, never incline oil seal.
    • Apply multi-purpose grease onto oil seal lips, and gear oil onto the circumference of oil seal.
    Fig 17: Installing Side Oil Seal Using Drift
    G07016654Courtesy of NISSAN NORTH AMERICA, INC.
  21. Apply multi-purpose grease to O-ring, and install it to gear carrier.
    CAUTION: Never reuse O-ring.
  22. Check and adjust drive gear runout, tooth contact, drive gear to drive pinion backlash, and total preload torque. Refer to "ADJUSTMENT ".

    Recheck above items. Readjust as described above, if necessary.

  23. Apply sealant to mating surface of carrier cover.
    CAUTION: Remove old sealant from mounting surfaces. Also remove any moisture, oil, or foreign material from application and mounting surfaces.
    Fig 18: Identifying Carrier Cover Sealant Application Area
    G07016695Courtesy of NISSAN NORTH AMERICA, INC.
  24. Install carrier cover on gear carrier and tighten mounting bolts.
    Fig 19: Locating Carrier Cover Mounting Bolts
    G07016696Courtesy of NISSAN NORTH AMERICA, INC.
  25. Set breather connector angle (A) as shown in the figure below.
    Fig 20: Identifying Breather Connector Angle
    G09175935Courtesy of NISSAN NORTH AMERICA, INC.

    A: 0 - 30° 

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