Nissan Murano: Unit Disassembly and Assembly / Differential Assembly

Exploded View

	Stud bolt		Connector bracket		Reamer bolt
	Electric controlled coupling assembly		Wave spring		Drive pinion oil seal
	Drive pinion lock nut		Pinion front bearing		Gear carrier
	Collapsible spacer		Drive pinion adjusting shim		Pinion rear bearing
	Drive pinion		Drive gear		Differential case
	Side bearing		Side bearing adjusting shim		Side oil seal
	Rear cover		Stud bolt		Gasket
	Drain plug		Filler plug		Pinion mate thrust washer
	Pinion mate gear		Side gear thrust washer		Side gear
	Pinion mate shaft		Lock pin
	Oil seal lip		Screw hole
: N·m (kg-m, in-lb)
: N·m (kg-m, ft-lb)
: Always replace after every disassembly.
: Select with proper thickness.
: Apply gear oil.
*: Apply anti-corrosion oil.
: Apply multi purpose grease.
: Apply Genuine Silicone RTV or equivalent. Refer to Recommended Chemical Products and Sealants.
: Apply Genuine High Strength Thread Locking Sealant or equivalent. Refer to Recommended Chemical Products and Sealants.

DISASSEMBLY

Remove drain plug, filler plug and gaskets.

Remove the side oil seal, using oil seal remover (commercial service tool).

CAUTION:

Do not damage gear carrier and rear cover.

Remove rear cover mounting bolts.

Set drifts (A and B) to the right and left side bearing adjusting shims individually. Press differential assembly with side bearing to remove gear carrier assembly and rear cover assembly.

CAUTION:

The pressure shall be as low as possible to remove gear carrier assembly and rear cover assembly. The maximum pressure shall be 10 kN (1 ton, 1.0 Imp ton).

NOTE:

Differential assembly, side bearings, and adjusting washers are compressed and integrated in gear carrier and rear cover.

Remove stud bolt from rear cover.

NOTE:

It is not necessary to remove stud bolt except when it is replaced.

Remove side bearing adjusting shims and side bearing outer races.

CAUTION:

Mark the side bearing adjusting shims so that the original mounting positions (right/left) can be identified later.

Remove side bearing inner races, using adaptor (A), separator (B) and puller (C).

CAUTION:

• To prevent damage to the side bearing and drive gear, place copper plates between these parts and vise.

• It is not necessary to remove side bearing inner race except when it is replaced.

For proper reinstallation, paint matching marks on one differential assembly and drive gear.

CAUTION:

For matching marks, use paint. do not damage differential assembly and drive gear.

Remove drive gear mounting bolts and then remove drive gear from differential assembly.

Remove lock pin of pinion mate shaft, using the pin punch (commercial service tool).

Remove pinion mate shaft.

Remove pinion mate gears, pinion mate thrust washers, side gears, side gear thrust washers from differential case.

CAUTION:

If replacing the side gears (A) or pinion mate gears (B), always replace as a set. Do not mix machined gears (D) with forged gears (C) or damage could result.

Perform inspection after disassembly. Refer to Inspection.

ASSEMBLY

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.

Install side gears and side gear thrust washers into differential case.

CAUTION:

If replacing the side gears (A) or pinion mate gears (B), always replace as a set. Do not mix machined gears (D) with forged gears (C) or damage could result.

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.

CAUTION:

If replacing the side gears (A) or pinion mate gears (B), always replace as a set. Do not mix machined gears (D) with forged gears (C) or damage could result.

Align the lock pin holes on differential case with pinion mate shaft, and install pinion mate shaft.

Measure side gear end play. If necessary, select the appropriate side gear thrust washers.Place differential assembly straight up so that side gear to be measured comes upward.

CAUTION:

To prevent side gear from tilting, insert feeler gauges with the same thickness from both sides.

• 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.

  CAUTION:

  Select a side gear thrust washer for right and left individually.

Drive a lock pin into pinion mate shaft, using the pin punch (commercial service tool).

CAUTION:

Do not reuse lock pin.

Press side bearing inner races to differential assembly, using the drifts (A and B).

CAUTION:

• Do not reuse side bearing inner race.

• Apply gear oil to side bearing.

Apply thread locking sealant into the thread hole of drive gear.

• For applying thread locking sealant, refer to Exploded View.

CAUTION:

Clean and degrees drive gear back and threaded holes sufficiently.

Install the drive gear to differential assembly.

CAUTION:

Align the matching mark of differential assembly and drive gear.

Tighten the bolts in a crisscross fashion to the specified torque.

• For tightening torque, refer to Exploded View.

CAUTION:

Apply anti-corrosion oil to the thread and seat of mounting bolts.

Assemble side bearing outer races to inner races.

CAUTION:

• Do not reuse side bearing outer race.

• Apply gear oil to side bearing.

Install new side bearing adjusting shims (2 pieces for one side) with the same thickness as the ones installed prior to disassembly or re-install the old ones, on side bearing outer race of differential assembly.

If side bearing adjusting shims have been already selected, use them.

Set the drifts (A and B) to the right and left side bearing adjusting shims individually. Compress differential assembly and side bearing to gear carrier assembly to install differential assembly.

CAUTION:

• The drift shall be placed on the center of the adjusting shims.

• The pressure shall be as low as possible to install differential assembly into gear carrier assembly. The maximum pressure shall be 10 kN (1 ton, 1.1 US ton, 1.0 Imp ton).

• If the adjusting shims are installed by tapping, the gear carrier may be damaged. Avoid tapping.

Install dummy cover set, check and adjust drive gear runout, tooth contact, backlash, and total preload torque. Refer to Adjustment.

Remove dummy cover set.

Install stud bolt to rear cover.

CAUTION:

Screw the stud bolt until the thread becomes invisible by applying a torque of 20 N·m (2.0 kg-m, 15 ft-lb) or less.

Apply liquid gasket to mating surface of rear cover.

• For applying liquid gasket, refer to Exploded View.

CAUTION:

• Remove old gasket adhering to the mounting surfaces. Also remove any moisture, oil, or foreign material adhering to the mounting surfaces.

• The width of sealant bead is approximately 3 mm (0.12 in). Apply sealant evenly.

Set the drifts (A and B) to the right and left side bearing adjusting shims individually. Compress differential assembly and side bearing to install rear cover.

CAUTION:

• The drift shall be placed on the center of the adjusting shims.

• The pressure shall be as low as possible to install differential assembly into gear carrier assembly. The maximum pressure shall be 10 kN (1 ton, 1.1 US ton, 1.0 Imp ton).

• If the adjusting shims are installed by tapping, the gear carrier may be damaged. Avoid tapping.

Tighten rear cover mounting bolts to the specified torque.

• For tightening torque, refer to Exploded View.

Using the drift (A) [SST: KV38100200 (J-26233)], drive side oil seals until it becomes flush with the gear carrier end.

CAUTION:

• Do not reuse oil seal.

• When installing, do not incline oil seal.

• Apply multi-purpose grease onto oil seal lips, and gear oil onto the circumference of oil seal.

Check total preload torque. Refer to Adjustment.

TOTAL PRELOAD TORQUE

Remove electric controlled coupling assembly. Refer to Disassembly and Assembly.

Rotate drive pinion back and forth 2 to 3 times to check for unusual noise and rotation malfunction.

Rotate drive pinion at least 20 times to check for smooth operation of the bearing.

Fit drive pinion socket onto drive pinion spline. Measure the total preload, using the preload gauge and drive pinion socket.

NOTE:

Total preload torque = Pinion bearing torque + Side bearing torque

• If measured value is out of the specification, disassemble it to check and adjust each part. Adjust the pinion bearing preload and side bearing preload.

  Adjust the pinion bearing preload first, then adjust the side bearing preload.

  When the preload torque is large
  	On pinion bearings:	Replace the collapsible spacer.
  	On side bearings:	Use thinner side bearing adjusting shims. For selecting adjusting shim, refer to the latest parts information.

  When the preload is small
  	On pinion bearings:	Tighten the drive pinion nut.
  	On side bearings:	Use thicker side bearing adjusting shims. For selecting adjusting shim, refer to the latest parts information.

DRIVE GEAR RUNOUT

Remove rear cover. Refer to Disassembly and Assembly.

Following the procedure below, install a dummy cover set [SST: KV381086S1 (  —  )] to gear carrier.Set dummy cover shims [SST: KV38108630 (  —  )] to the right and left side bearing adjusting shims. Temporarily tighten dummy cover [SST: KV38108610 (  —  )] to gear carrier. Position dummy cover spacers [SST: KV38108621 (  —  )] to dummy cover [SST: KV38108610 (  —  )]. Tighten rear cover mounting bolts to the specified torque. Refer to Exploded View. Tighten dummy cover spacer mounting bolts evenly to the specified torque.

: 5.9 N·m (0.6 kg-m, 52 in-lb)

Fit a dial indicator (A) to the drive gear back face.

Rotate the drive gear to measure runout.

• If the runout is outside of the repair limit, check drive gear assembly condition; foreign material may be caught between drive gear and differential case, or differential case or drive gear may be deformed, etc.

  CAUTION:

  Replace drive gear and drive pinion as a set.

TOOTH CONTACT

Remove rear cover. Refer to Disassembly and Assembly.

Following the procedure below, install a dummy cover set [SST: KV381086S1 (  —  )] to gear carrier.Set dummy cover shims [SST: KV38108630 (  —  )] to the right and left side bearing adjusting shims. Temporarily tighten dummy cover [SST: KV38108610 (  —  )] to gear carrier. Position dummy cover spacers [SST: KV38108621 (  —  )] to dummy cover [SST: KV38108610 (  —  )]. Tighten rear cover mounting bolts to the specified torque. Refer to Exploded View. Tighten dummy cover spacer mounting bolts evenly to the specified torque.

: 5.9 N·m (0.6 kg-m, 52 in-lb)

Apply red lead or equivalent to drive gear.

CAUTION:

Apply red lead or equivalent to both the faces of 3 to 4 gears at 4 locations evenly spaced on drive gear.

Rotate drive gear back and forth several times, check drive pinion gear to drive gear tooth contact.

CAUTION:

Check tooth contact on drive side and reverse side.

Tooth Contact Judgment Guide

If tooth contact is improperly adjusted, follow the procedure below to adjust the pinion height (dimension X).

• If the tooth contact is near the face (face contact), or near the heel (heel contact), thicken drive pinion gear adjusting shim to move drive pinion closer to drive gear.

  

  For selecting adjusting shim, refer to the latest parts information.

• If the tooth contact is near the flank (flank contact), or near the toe (toe contact), thin drive pinion gear adjusting shim to move drive pinion farther from drive gear.

  

  For selecting adjusting shim, refer to the latest parts information.

BACKLASH

Remove rear cover. Refer to Disassembly and Assembly.

Following the procedure below, install a dummy cover set [SST: KV381086S1 (  —  )] to gear carrier.Set dummy cover shims [SST: KV38108630 (  —  )] to the right and left side bearing adjusting shims. Temporarily tighten dummy cover [SST: KV38108610 (  —  )] to gear carrier. Position dummy cover spacers [SST: KV38108621 (  —  )] to dummy cover [SST: KV38108610 (  —  )]. Tighten rear cover mounting bolts to the specified torque. Refer to Exploded View. Tighten dummy cover spacer mounting bolts evenly to the specified torque.

: 5.9 N·m (0.6 kg-m, 52 in-lb)

Fit a dial indicator (A) to the drive gear face to measure the backlash.

• If the backlash is outside of the specified value, change the thickness of side bearing adjusting shims.

INSPECTION AFTER DISASSEMBLY

Drive Gear and Drive Pinion

Clean up the disassembled parts.

If the gear teeth never mesh or line-up correctly, determine the cause and adjust or replace as necessary.

If the gears are worn, cracked, damaged, pitted or chipped (by friction) noticeably, replace with new drive gear and drive pinion as a set.

Bearing

• Clean up the disassembled parts.

• If any chipped (by friction), pitted, worn, rusted or scratched marks, or unusual noise from the bearing is observed, replace as a bearing assembly (as a new set).

Oil Seal

• Whenever disassembled, replace.

• If wear, deterioration of adherence (sealing force lips), or damage is detected on the lips, replace them.

Differential Assembly

DIFFERENTIAL CASE

• Clean up the disassembled parts.

• If any wear or crack on the contact sides of the differential case is found, replace.

SIDE GEAR AND PINION MATE GEAR

CAUTION:

If replacing the side gears (A) or pinion mate gears (B), always replace as a set. Do not mix machined gears (D) with forged gears (C) or damage could result.

• Clean up the disassembled parts.

• If any cracks or damage on the surface of the tooth is found, replace.

• If any worn or chipped mark on the contact sides of the thrust washer is found, replace.

SIDE GEAR THRUST WASHER AND PINION MATE THRUST WASHER

• Clean up the disassembled parts.

• If it is chipped (by friction), damaged, or unusually worn, replace.