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Home >> Infiniti >> 2018 >> QX80 AWD >> Repair and Diagnosis (Single Page) >> Transmission >> Transfer Case >> Driveline System (Service Information) >> Disassembly And Assembly >> Front Final Drive Differential Assembly >> FRONT FINAL DRIVE DIFFERENTIAL ASSEMBLY : Disassembly & Assembly
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FRONT FINAL DRIVE DIFFERENTIAL ASSEMBLY : Disassembly & Assembly

  1. Remove bushing with drift (commercial service tool).
  2. Remove differential side shaft assembly. Refer to SIDE SHAFT : Disassembly & Assembly .
  3. Remove side oil seal (left side) from gear carrier with a suitable tool.
  4. For proper reinstallation, paint matching marks on one side of the side bearing cap and gear carrier.
    G04076359Courtesy of NISSAN NORTH AMERICA, INC.
    CAUTION:
    • For matching marks, use paint. Never damage side bearing cap and gear carrier.
    • Bearing caps are manufactured as integral molding. Use the matching marks to them in their original positions.
  5. Remove the side bearing caps.
    G04175087Courtesy of NISSAN NORTH AMERICA, INC.
  6. Lift the differential case assembly out of the gear carrier with sliding hammer (commercial service tool).
    G04076361Courtesy of NISSAN NORTH AMERICA, INC.
  7. Remove the differential case assembly with the side bearing outer race and side bearing adjusting washer.
    G04082184Courtesy of NISSAN NORTH AMERICA, INC.
    CAUTION:
    • Keep side bearing outer races together with side bearing inner races. Do not mix them up.
    • Keep side bearing adjusting washers together with side bearings.
  8. Remove housing spacer.
  9. Remove side bearing inner race with the puller (A) and base (B).
    G04149959Courtesy of NISSAN NORTH AMERICA, INC.

    A: Puller [SST: ST33051001 (J-22888-20)]

    B: Base [SST: ST33061000 (J-8107-2)]
    CAUTION:
    • To prevent damage to the side bearing and drive gear, place copper plates between these parts and vise.
    • It is necessary to remove side bearing inner race except when it is replaced.
  10. For proper reinstallation, paint matching marks on the differential case and drive gear.
    G04076246Courtesy of NISSAN NORTH AMERICA, INC.
    CAUTION: For matching marks, use paint. Never damage differential case and drive gear.
  11. Remove the drive mounting gear bolts.
  12. Tap the drive gear off the differential case using suitable tool.
    CAUTION: Tap evenly all around to keep drive gear from bending.
  13. Perform inspection after disassembly. Refer to FRONT FINAL DRIVE DIFFERENTIAL ASSEMBLY : Disassembly & Assembly .

    ASSEMBLY 

  1. Apply thread locking sealant into the threaded holes of the drive gear and install the new drive gear bolts.
    G04076281Courtesy of NISSAN NORTH AMERICA, INC.
    CAUTION: Clean degrees drive gear back and threaded holes sufficiently.
  2. Install the drive gear to differential case assembly.
    CAUTION: Align the matching marks of differential case assembly and drive gear
  3. Tighten the drive gear mounting bolts with the following procedure.
    CAUTION: Apply anti-corrosion oil to the thread and seat of mounting bolts.
    1. Tighten the bolts in a crisscross fashion to the specified torque.

      Drive gear mounting bolts tightening torque

      : 58.8 N.m (6.0 kg-m, 43 ft-lb)
    2. Tighten the bolts additionally at the specified angle.
      GNSAWBIA0722Z-722Courtesy of NISSAN NORTH AMERICA, INC.

      Drive gear mounting bolts tightening angle

      : 34 to 37 degree
      CAUTION: Check the tightening angle using the angle wrench (A) [SST: KV10112100 (BT-8653-A)]. Never make judgment by visual inspection.
  4. Press side bearing inner races to the differential case with the drift (A) and the base (B).
    G04076407Courtesy of NISSAN NORTH AMERICA, INC.

    A: Drift [SST: ST33230000 (J-35867)]

    B: Base [SST: ST33061000 (J-8107-2)]
    CAUTION: Never reuse side bearing inner races.
  5. Install housing spacer.
  6. Install the differential case assembly with the side bearing outer races into the gear carrier.
    G04082184Courtesy of NISSAN NORTH AMERICA, INC.
    CAUTION:
    • Never reuse side bearing outer race when replacing side bearing inner race (replace as a set).
    • Apply differential gear oil to the side bearings.
  7. Insert left and right original side bearing adjusting washers in place between side bearings and gear carrier.
    G04082198Courtesy of NISSAN NORTH AMERICA, INC.
  8. Install the side bearing caps with the matching marks aligned and tighten the side bearing cap bolts to the specified torque.
    G04076359Courtesy of NISSAN NORTH AMERICA, INC.
    CAUTION: Align matching marks on bearing cap with that on gear carrier.
  9. Install side oil seal (left side) until it becomes flush with the gear carrier with the drift (A and B).
    G04150004Courtesy of NISSAN NORTH AMERICA, INC.

    A: Drift [SST: ST30720000 (J-25405)]

    B: Drift [SST: ST27863000 (--)]
    CAUTION:
    • Never reuse side 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.
  10. Check and adjust drive gear runout, tooth contact, backlash, and total preload torque. Refer to FRONT FINAL DRIVE DIFFERENTIAL ASSEMBLY : Adjustment .

    Recheck above items. Readjust the above description, if necessary.

  11. Apply sealant to match surface of carrier cover.
    G04149922Courtesy of NISSAN NORTH AMERICA, INC.
    CAUTION: Remove any old sealant from the mating surfaces. Also remove any moisture, oil, or foreign material from the application and mating surfaces.
  12. Install the carrier cover to the gear carrier. Tighten the bolts to the specified torque.
  13. Install side shaft. Refer to SIDE SHAFT : Disassembly & Assembly .
  14. Install bushing with drift (commercial service tool).
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